Vulnerability-Lookup

CVE-2026-9277 (GCVE-0-2026-9277)

Vulnerability from cvelistv5 – Published: 2026-05-22 13:22 – Updated: 2026-07-02 12:05

Title

shell-quote `quote()` does not validate object-token shapes, allowing command injection via line terminators in `.op`

Summary

shell-quote's `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: '...\n...' }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser's control-operator allowlist; `{ op: 'glob', pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.

Severity ?

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

9.2 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-77 - Improper Neutralization of Special Elements used in a Command ('Command Injection')

Assigner

harborist

References

URL

Tags

	https://github.com/ljharb/shell-quote/security/ad…	vendor-advisory
	https://github.com/ljharb/shell-quote/commit/1518179	patch
	https://github.com/ljharb/shell-quote	product
	https://www.npmjs.com/package/shell-quote	product

Impacted products

	Vendor	Product	Version
		shell-quote	Affected: 1.1.0 , < 1.8.4 (semver)

Credits

Akshat Sinha (@akshatgit) Jordan Harband (@ljharb)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-9277",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-22T14:17:31.964845Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-22T14:17:39.549Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2026-05-23T03:04:40.537Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "http://www.openwall.com/lists/oss-security/2026/05/23/2"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/a:redhat:cryostat:4::el9"
            ],
            "defaultStatus": "affected",
            "product": "Cryostat 4 on RHEL 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:cluster_observability_operator:1.5::el9"
            ],
            "defaultStatus": "affected",
            "product": "Cluster Observability Operator 1.5.0",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhdh:1.9::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Developer Hub 1.9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:discovery:2::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Discovery 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift:4.21::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Container Platform 4.21",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift:4.22::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Container Platform 4.22",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_mesh:2.6::el8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Service Mesh 2.6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_mesh:3.0::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Service Mesh 3.0",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_mesh:3.1::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Service Mesh 3.1",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_mesh:3.2::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Service Mesh 3.2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_mesh:3.3::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Service Mesh 3.3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:quay:3.10::el8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Quay 3.10",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:quay:3.12::el8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Quay 3.12",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:quay:3.9::el8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Quay 3.9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:satellite:6.18::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Satellite 6.18",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:rhmt:1"
            ],
            "defaultStatus": "affected",
            "product": "Migration Toolkit for Containers",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_lightspeed"
            ],
            "defaultStatus": "affected",
            "product": "OpenShift Lightspeed",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_pipelines:1"
            ],
            "defaultStatus": "affected",
            "product": "OpenShift Pipelines",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:ansible_automation_platform:2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Ansible Automation Platform 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:podman_desktop:1"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Build of Podman Desktop",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:podman_desktop:0"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Build of Podman Desktop - Tech Preview",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:enterprise_linux_ai:3"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_fuse:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Fuse 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift:4"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:container_native_virtualization:4"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat OpenShift Virtualization 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:ansible_portal:2"
            ],
            "defaultStatus": "affected",
            "product": "Self-service automation portal 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:cryostat:4"
            ],
            "defaultStatus": "unaffected",
            "product": "Cryostat 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:gatekeeper:3"
            ],
            "defaultStatus": "unaffected",
            "product": "Gatekeeper 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:workload_availability_nhc:0"
            ],
            "defaultStatus": "unaffected",
            "product": "Node HealthCheck Operator",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:service_mesh:3"
            ],
            "defaultStatus": "unaffected",
            "product": "OpenShift Service Mesh 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:amq_broker:7"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat AMQ Broker 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:apache_camel_hawtio:4"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat build of Apache Camel - HawtIO 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_data_grid:8"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Data Grid 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:8"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:openshift_ai"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat OpenShift AI (RHOAI)",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:trusted_artifact_signer:1"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Trusted Artifact Signer",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-05-22T13:22:38.873Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in the shell-quote component. The quote() function did not properly validate object-token inputs, allowing line terminators to pass unescaped into the output. A remote attacker could exploit this vulnerability by providing specially crafted input, which a POSIX shell would interpret as a command separator. This could lead to command injection, enabling the attacker to execute arbitrary code on the system."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-78",
                "description": "Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-07-02T12:05:20.533Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-9277"
          },
          {
            "name": "RHBZ#2480741",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480741"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9277.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:28010"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:34342"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:33574"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26234"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:29197"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:29834"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:29795"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26072"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26080"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26077"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26079"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26090"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:33683"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:30076"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:28571"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:26225"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:28010: Cryostat 4 on RHEL 9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:34342: Cluster Observability Operator 1.5.0"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:33574: Red Hat Developer Hub 1.9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26234: Red Hat Developer Hub 1.9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:29197: Red Hat Discovery 2"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:29834: Red Hat OpenShift Container Platform 4.21"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:29795: Red Hat OpenShift Container Platform 4.22"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26072: Red Hat OpenShift Service Mesh 2.6"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26080: Red Hat OpenShift Service Mesh 3.0"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26077: Red Hat OpenShift Service Mesh 3.1"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26079: Red Hat OpenShift Service Mesh 3.2"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26090: Red Hat OpenShift Service Mesh 3.3"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:33683: Red Hat Quay 3.10"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:30076: Red Hat Quay 3.12"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:28571: Red Hat Quay 3.9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:26225: Red Hat Satellite 6.18"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-05-22T14:01:14.427Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-05-22T13:22:38.873Z",
            "value": "Made public."
          }
        ],
        "title": "shell-quote: shell-quote: Arbitrary code execution via command injection due to unescaped line terminators",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://www.npmjs.com/package/shell-quote",
          "defaultStatus": "unaffected",
          "packageName": "shell-quote",
          "product": "shell-quote",
          "programFiles": [
            "quote.js"
          ],
          "repo": "https://github.com/ljharb/shell-quote",
          "versions": [
            {
              "lessThan": "1.8.4",
              "status": "affected",
              "version": "1.1.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Akshat Sinha (@akshatgit)"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Jordan Harband (@ljharb)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eshell-quote\u0027s `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: \u0027...\\n...\u0027 }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser\u0027s control-operator allowlist; `{ op: \u0027glob\u0027, pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.\u003c/p\u003e"
            }
          ],
          "value": "shell-quote\u0027s `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: \u0027...\\n...\u0027 }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser\u0027s control-operator allowlist; `{ op: \u0027glob\u0027, pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 9.2,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-78",
              "description": "CWE-78 Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-77",
              "description": "CWE-77 Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-22T13:22:38.873Z",
        "orgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
        "shortName": "harborist"
      },
      "references": [
        {
          "name": "GHSA-w7jw-789q-3m8p",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p"
        },
        {
          "name": "Fix commit",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/ljharb/shell-quote/commit/1518179"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/ljharb/shell-quote"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.npmjs.com/package/shell-quote"
        }
      ],
      "source": {
        "advisory": "GHSA-w7jw-789q-3m8p",
        "discovery": "EXTERNAL"
      },
      "title": "shell-quote `quote()` does not validate object-token shapes, allowing command injection via line terminators in `.op`"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
    "assignerShortName": "harborist",
    "cveId": "CVE-2026-9277",
    "datePublished": "2026-05-22T13:22:38.873Z",
    "dateReserved": "2026-05-22T12:13:25.893Z",
    "dateUpdated": "2026-07-02T12:05:20.533Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"http://www.openwall.com/lists/oss-security/2026/05/23/2\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2026-05-23T03:04:40.537Z\"}}, {\"title\": \"shell-quote: shell-quote: Arbitrary code execution via command injection due to unescaped line terminators\", \"metrics\": [{\"other\": {\"type\": \"Red Hat severity rating\", \"content\": {\"value\": \"Important\", \"namespace\": \"https://access.redhat.com/security/updates/classification/\"}}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"cpes\": [\"cpe:/a:redhat:cryostat:4::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Cryostat 4 on RHEL 9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhdh:1.9::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Developer Hub 1.9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:discovery:2::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Discovery 2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4.21::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4.21\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4.22::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4.22\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:service_mesh:2.6::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Service Mesh 2.6\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:service_mesh:3.0::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Service Mesh 3.0\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:service_mesh:3.1::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Service Mesh 3.1\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:service_mesh:3.2::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Service Mesh 3.2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:service_mesh:3.3::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Service Mesh 3.3\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:quay:3.10::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Quay 3.10\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:quay:3.12::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Quay 3.12\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:quay:3.9::el8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Quay 3.9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:satellite:6.18::el9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Satellite 6.18\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:rhmt:1\"], \"vendor\": \"Red Hat\", \"product\": \"Migration Toolkit for Containers\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_lightspeed\"], \"vendor\": \"Red Hat\", \"product\": \"OpenShift Lightspeed\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_pipelines:1\"], \"vendor\": \"Red Hat\", \"product\": \"OpenShift Pipelines\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:ansible_automation_platform:2\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Ansible Automation Platform 2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:podman_desktop:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Build of Podman Desktop\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:podman_desktop:0\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Build of Podman Desktop - Tech Preview\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:9\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 9\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:enterprise_linux_ai:3\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux AI (RHEL AI) 3\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_fuse:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Fuse 7\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Container Platform 4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:container_native_virtualization:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift Virtualization 4\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:ansible_portal:2\"], \"vendor\": \"Red Hat\", \"product\": \"Self-service automation portal 2\", \"defaultStatus\": \"affected\"}, {\"cpes\": [\"cpe:/a:redhat:cryostat:4\"], \"vendor\": \"Red Hat\", \"product\": \"Cryostat 4\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:gatekeeper:3\"], \"vendor\": \"Red Hat\", \"product\": \"Gatekeeper 3\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:workload_availability_nhc:0\"], \"vendor\": \"Red Hat\", \"product\": \"Node HealthCheck Operator\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:service_mesh:3\"], \"vendor\": \"Red Hat\", \"product\": \"OpenShift Service Mesh 3\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:amq_broker:7\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat AMQ Broker 7\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:apache_camel_hawtio:4\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat build of Apache Camel - HawtIO 4\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:jboss_data_grid:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Data Grid 8\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:10\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 10\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/o:redhat:enterprise_linux:8\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Enterprise Linux 8\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:openshift_ai\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat OpenShift AI (RHOAI)\", \"defaultStatus\": \"unaffected\"}, {\"cpes\": [\"cpe:/a:redhat:trusted_artifact_signer:1\"], \"vendor\": \"Red Hat\", \"product\": \"Red Hat Trusted Artifact Signer\", \"defaultStatus\": \"unaffected\"}], \"timeline\": [{\"lang\": \"en\", \"time\": \"2026-05-22T14:01:14.427Z\", \"value\": \"Reported to Red Hat.\"}, {\"lang\": \"en\", \"time\": \"2026-05-22T13:22:38.873Z\", \"value\": \"Made public.\"}], \"solutions\": [{\"lang\": \"en\", \"value\": \"RHSA-2026:28010: Cryostat 4 on RHEL 9\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:33574: Red Hat Developer Hub 1.9\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:26234: Red Hat Developer Hub 1.9\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:29197: Red Hat Discovery 2\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:29834: Red Hat OpenShift Container Platform 4.21\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:29795: Red Hat OpenShift Container Platform 4.22\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:26072: Red Hat OpenShift Service Mesh 2.6\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:26080: Red Hat OpenShift Service Mesh 3.0\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:26077: Red Hat OpenShift Service Mesh 3.1\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:26079: Red Hat OpenShift Service Mesh 3.2\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:26090: Red Hat OpenShift Service Mesh 3.3\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:33683: Red Hat Quay 3.10\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:30076: Red Hat Quay 3.12\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:28571: Red Hat Quay 3.9\"}, {\"lang\": \"en\", \"value\": \"RHSA-2026:26225: Red Hat Satellite 6.18\"}], \"x_adpType\": \"supplier\", \"datePublic\": \"2026-05-22T13:22:38.873Z\", \"references\": [{\"url\": \"https://access.redhat.com/security/cve/CVE-2026-9277\", \"tags\": [\"vdb-entry\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://bugzilla.redhat.com/show_bug.cgi?id=2480741\", \"name\": \"RHBZ#2480741\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9277.json\", \"tags\": [\"x_sadp-csaf-vex\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28010\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:33574\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:26234\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:29197\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:29834\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:29795\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:26072\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:26080\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:26077\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:26079\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:26090\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:33683\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:30076\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:28571\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}, {\"url\": \"https://access.redhat.com/errata/RHSA-2026:26225\", \"tags\": [\"vendor-advisory\", \"x_refsource_REDHAT\"]}], \"x_generator\": {\"engine\": \"sadp-cli 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"A flaw was found in the shell-quote component. The quote() function did not properly validate object-token inputs, allowing line terminators to pass unescaped into the output. A remote attacker could exploit this vulnerability by providing specially crafted input, which a POSIX shell would interpret as a command separator. This could lead to command injection, enabling the attacker to execute arbitrary code on the system.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-78\", \"description\": \"Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\", \"shortName\": \"redhat-SADP\", \"dateUpdated\": \"2026-07-01T12:05:04.313Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-9277\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-22T14:17:31.964845Z\"}}}], \"references\": [{\"url\": \"https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-05-22T14:17:25.193Z\"}}], \"cna\": {\"title\": \"shell-quote `quote()` does not validate object-token shapes, allowing command injection via line terminators in `.op`\", \"source\": {\"advisory\": \"GHSA-w7jw-789q-3m8p\", \"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Akshat Sinha (@akshatgit)\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Jordan Harband (@ljharb)\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 8.1, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"HIGH\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}, {\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 9.2, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"CRITICAL\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N\", \"exploitMaturity\": \"NOT_DEFINED\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"HIGH\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"repo\": \"https://github.com/ljharb/shell-quote\", \"product\": \"shell-quote\", \"versions\": [{\"status\": \"affected\", \"version\": \"1.1.0\", \"lessThan\": \"1.8.4\", \"versionType\": \"semver\"}], \"packageName\": \"shell-quote\", \"programFiles\": [\"quote.js\"], \"collectionURL\": \"https://www.npmjs.com/package/shell-quote\", \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p\", \"name\": \"GHSA-w7jw-789q-3m8p\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/ljharb/shell-quote/commit/1518179\", \"name\": \"Fix commit\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/ljharb/shell-quote\", \"tags\": [\"product\"]}, {\"url\": \"https://www.npmjs.com/package/shell-quote\", \"tags\": [\"product\"]}], \"descriptions\": [{\"lang\": \"en\", \"value\": \"shell-quote\u0027s `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\\\n, \\\\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: \u0027...\\\\n...\u0027 }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser\u0027s control-operator allowlist; `{ op: \u0027glob\u0027, pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eshell-quote\u0027s `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\\\n, \\\\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: \u0027...\\\\n...\u0027 }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser\u0027s control-operator allowlist; `{ op: \u0027glob\u0027, pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-78\", \"description\": \"CWE-78 Improper Neutralization of Special Elements used in an OS Command (\u0027OS Command Injection\u0027)\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-77\", \"description\": \"CWE-77 Improper Neutralization of Special Elements used in a Command (\u0027Command Injection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"7ffcee3d-2c14-4c3e-b844-86c6a321a158\", \"shortName\": \"harborist\", \"dateUpdated\": \"2026-05-22T13:22:38.873Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-9277\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-07-01T12:05:04.313Z\", \"dateReserved\": \"2026-05-22T12:13:25.893Z\", \"assignerOrgId\": \"7ffcee3d-2c14-4c3e-b844-86c6a321a158\", \"datePublished\": \"2026-05-22T13:22:38.873Z\", \"assignerShortName\": \"harborist\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}

FKIE_CVE-2026-9277

Vulnerability from fkie_nvd - Published: 2026-05-22 14:16 - Updated: 2026-07-02 12:17

Severity ?

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	7ffcee3d-2c14-4c3e-b844-86c6a321a158	https://github.com/ljharb/shell-quote
	7ffcee3d-2c14-4c3e-b844-86c6a321a158	https://github.com/ljharb/shell-quote/commit/1518179
	7ffcee3d-2c14-4c3e-b844-86c6a321a158	https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p
	7ffcee3d-2c14-4c3e-b844-86c6a321a158	https://www.npmjs.com/package/shell-quote
	af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2026/05/23/2
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:26072
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:26077
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:26079
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:26080
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:26090
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:26225
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:26234
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:28010
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:28571
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:29197
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:29795
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:29834
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:30076
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:33574
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:33683
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/errata/RHSA-2026:34342
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://access.redhat.com/security/cve/CVE-2026-9277
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://bugzilla.redhat.com/show_bug.cgi?id=2480741
	134c704f-9b21-4f2e-91b3-4a467353bcc0	https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p
	0b0ca135-0b70-47e7-9f44-1890c2a1c46c	https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9277.json

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://www.npmjs.com/package/shell-quote",
          "defaultStatus": "unaffected",
          "packageName": "shell-quote",
          "product": "shell-quote",
          "programFiles": [
            "quote.js"
          ],
          "repo": "https://github.com/ljharb/shell-quote",
          "versions": [
            {
              "lessThan": "1.8.4",
              "status": "affected",
              "version": "1.1.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158"
    },
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:/a:redhat:cryostat:4::el9"
          ],
          "defaultStatus": "affected",
          "product": "Cryostat 4 on RHEL 9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:cluster_observability_operator:1.5::el9"
          ],
          "defaultStatus": "affected",
          "product": "Cluster Observability Operator 1.5.0",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:rhdh:1.9::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Developer Hub 1.9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:discovery:2::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Discovery 2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift:4.21::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Container Platform 4.21",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift:4.22::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Container Platform 4.22",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:service_mesh:2.6::el8"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Service Mesh 2.6",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:service_mesh:3.0::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Service Mesh 3.0",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:service_mesh:3.1::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Service Mesh 3.1",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:service_mesh:3.2::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Service Mesh 3.2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:service_mesh:3.3::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Service Mesh 3.3",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.10::el8"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Quay 3.10",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.12::el8"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Quay 3.12",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:quay:3.9::el8"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Quay 3.9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:satellite:6.18::el9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Satellite 6.18",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:rhmt:1"
          ],
          "defaultStatus": "affected",
          "product": "Migration Toolkit for Containers",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_lightspeed"
          ],
          "defaultStatus": "affected",
          "product": "OpenShift Lightspeed",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_pipelines:1"
          ],
          "defaultStatus": "affected",
          "product": "OpenShift Pipelines",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ansible_automation_platform:2"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Ansible Automation Platform 2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:podman_desktop:1"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Build of Podman Desktop",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:podman_desktop:0"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Build of Podman Desktop - Tech Preview",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:9"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux 9",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:enterprise_linux_ai:3"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:jboss_fuse:7"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat Fuse 7",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift:4"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Container Platform 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:container_native_virtualization:4"
          ],
          "defaultStatus": "affected",
          "product": "Red Hat OpenShift Virtualization 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:ansible_portal:2"
          ],
          "defaultStatus": "affected",
          "product": "Self-service automation portal 2",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:cryostat:4"
          ],
          "defaultStatus": "unaffected",
          "product": "Cryostat 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:gatekeeper:3"
          ],
          "defaultStatus": "unaffected",
          "product": "Gatekeeper 3",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:workload_availability_nhc:0"
          ],
          "defaultStatus": "unaffected",
          "product": "Node HealthCheck Operator",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:service_mesh:3"
          ],
          "defaultStatus": "unaffected",
          "product": "OpenShift Service Mesh 3",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:amq_broker:7"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat AMQ Broker 7",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:apache_camel_hawtio:4"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat build of Apache Camel - HawtIO 4",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:jboss_data_grid:8"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Data Grid 8",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:10"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Enterprise Linux 10",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/o:redhat:enterprise_linux:8"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Enterprise Linux 8",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:openshift_ai"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat OpenShift AI (RHOAI)",
          "vendor": "Red Hat"
        },
        {
          "cpes": [
            "cpe:/a:redhat:trusted_artifact_signer:1"
          ],
          "defaultStatus": "unaffected",
          "product": "Red Hat Trusted Artifact Signer",
          "vendor": "Red Hat"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "shell-quote\u0027s `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (\\n, \\r, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal newline as a command separator, so any content after it would execute as a second command. The vulnerable code path is reachable in two ways: (1) direct construction of `{ op: \u0027...\\n...\u0027 }` from external input, and (2) via `parse(cmd, envFn)` when `envFn` returns object tokens whose `.op` is attacker-influenced. Both are documented API surface. Fixed by replacing the per-character escape with strict shape validation: `.op` must match the parser\u0027s control-operator allowlist; `{ op: \u0027glob\u0027, pattern }` validates `pattern` and forbids line terminators; `{ comment }` validates `comment` and forbids line terminators; any other object shape throws `TypeError`."
    }
  ],
  "id": "CVE-2026-9277",
  "lastModified": "2026-07-02T12:17:45.863",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.2,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-9277",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-05-22T14:17:31.964845Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-05-22T14:16:30.330",
  "references": [
    {
      "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
      "url": "https://github.com/ljharb/shell-quote"
    },
    {
      "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
      "url": "https://github.com/ljharb/shell-quote/commit/1518179"
    },
    {
      "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
      "url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p"
    },
    {
      "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
      "url": "https://www.npmjs.com/package/shell-quote"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/23/2"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26072"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26077"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26079"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26080"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26090"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26225"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:26234"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:28010"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:28571"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:29197"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:29795"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:29834"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:30076"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:33574"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:33683"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/errata/RHSA-2026:34342"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://access.redhat.com/security/cve/CVE-2026-9277"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480741"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p"
    },
    {
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9277.json"
    }
  ],
  "sourceIdentifier": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-77"
        },
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "7ffcee3d-2c14-4c3e-b844-86c6a321a158",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "type": "Secondary"
    }
  ]
}

GHSA-W7JW-789Q-3M8P

Vulnerability from github – Published: 2026-06-09 14:27 – Updated: 2026-06-09 14:27

Summary

shell-quote quote() does not escape newlines in object .op values

Details

Summary

shell-quote's quote() function did not validate object-token inputs against the operator model used by parse(). The .op field was backslash-escaped character by character using /(.)/g, which in JavaScript does not match line terminators (\n, \r, U+2028, U+2029). A line terminator in .op therefore passed through unescaped into the output; POSIX shells treat a literal \n as a command separator, so any content after it would execute as a second command.

The vulnerable code path is reachable in two ways. Neither requires the parser to misbehave — parse() only emits ops from a fixed control set — but both are documented API surface:

Direct construction. A caller builds { op: '...\n...' } from external input (e.g. a deserialized argument array) and passes it to quote().
envFn return. parse(cmd, envFn) is documented to splice the return value of envFn into the result array when it is an object. An attacker-influenced data source consulted by envFn can introduce an object token whose .op reaches quote().

Impact

Shell command injection in callers that pass object tokens with attacker-influenced .op values to quote() and then hand the result to a shell. The preconditions are narrower than ordinary string injection — they require the caller to feed object tokens into quote() — but object tokens are a public, documented part of the API surface, and quote() is intended to be a shell-safety boundary.

PoC

const { parse, quote } = require('shell-quote');

// Direct construction
quote([{ op: ';\nid' }]);
// → "\;\n\\i\\d"  ← literal newline; second line executes as a command

// Via parse() with an envFn returning attacker-shaped objects
const tokens = parse('echo $X', () => ({ op: ';\nid' }));
require('child_process').execSync(quote(tokens), { shell: true });
// Executes `id` after `echo \;`.

Confirmed under sh, bash, dash, and zsh.

Patch

Fixed by replacing the per-character escape with strict shape validation in quote(). The object-token branch now:

{ op } — .op must be a string from the same allowlist the parser emits (||, &&, ;;, |&, <(, <<<, >>, >&, <&, &, ;, (, ), |, <, >). Anything else throws TypeError. This is the direct fix for the reported issue and removes the entire class of .op injection.
{ op: 'glob', pattern } — .pattern must be a string with no line terminators. Glob metacharacters (*, ?, [, ], {, }, ,) pass through; all other shell-special characters are backslash-escaped. (Previously the pattern field was discarded entirely and the literal string \g\l\o\b was emitted — a latent bug, not security-relevant.)
{ comment } — .comment must be a string with no line terminators (line terminators would end the shell comment and resume command parsing — same injection shape).
Any other object shape — TypeError.

The fix is allowlist-based rather than a targeted regex tweak, so it closes the reported vector and forecloses adjacent ones (U+2028 / U+2029 line separators in .op, line terminators in comments, unknown-shape objects coerced through .replace).

Workarounds

Prior to upgrading, callers that build object tokens from untrusted input should validate .op against the parser's operator set themselves, and never construct { op } from attacker-controlled strings.

Credits

Reported by Akshat Sinha

Severity ?

8.1 (High)


                  
                    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

9.2 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.8.3"
      },
      "package": {
        "ecosystem": "npm",
        "name": "shell-quote"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.1.0"
            },
            {
              "fixed": "1.8.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-9277"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-77",
      "CWE-78"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-06-09T14:27:15Z",
    "nvd_published_at": "2026-05-22T14:16:30Z",
    "severity": "CRITICAL"
  },
  "details": "### Summary\n\n`shell-quote`\u0027s `quote()` function did not validate object-token inputs against the operator model used by `parse()`. The `.op` field was backslash-escaped character by character using `/(.)/g`, which in JavaScript does not match line terminators (`\\n`, `\\r`, U+2028, U+2029). A line terminator in `.op` therefore passed through unescaped into the output; POSIX shells treat a literal `\\n` as a command separator, so any content after it would execute as a second command.\n\nThe vulnerable code path is reachable in two ways. Neither requires the parser to misbehave \u2014 `parse()` only emits ops from a fixed control set \u2014 but both are documented API surface:\n\n1. **Direct construction.** A caller builds `{ op: \u0027...\\n...\u0027 }` from external input (e.g. a deserialized argument array) and passes it to `quote()`.\n2. **`envFn` return.** `parse(cmd, envFn)` is documented to splice the return value of `envFn` into the result array when it is an object. An attacker-influenced data source consulted by `envFn` can introduce an object token whose `.op` reaches `quote()`.\n\n### Impact\n\nShell command injection in callers that pass object tokens with attacker-influenced `.op` values to `quote()` and then hand the result to a shell. The preconditions are narrower than ordinary string injection \u2014 they require the caller to feed object tokens into `quote()` \u2014 but object tokens are a public, documented part of the API surface, and `quote()` is intended to be a shell-safety boundary.\n\n### PoC\n\n```js\nconst { parse, quote } = require(\u0027shell-quote\u0027);\n\n// Direct construction\nquote([{ op: \u0027;\\nid\u0027 }]);\n// \u2192 \"\\;\\n\\\\i\\\\d\"  \u2190 literal newline; second line executes as a command\n\n// Via parse() with an envFn returning attacker-shaped objects\nconst tokens = parse(\u0027echo $X\u0027, () =\u003e ({ op: \u0027;\\nid\u0027 }));\nrequire(\u0027child_process\u0027).execSync(quote(tokens), { shell: true });\n// Executes `id` after `echo \\;`.\n```\n\nConfirmed under `sh`, `bash`, `dash`, and `zsh`.\n\n### Patch\n\nFixed by replacing the per-character escape with strict shape validation in `quote()`. The object-token branch now:\n\n- **`{ op }`** \u2014 `.op` must be a string from the same allowlist the parser emits (`||`, `\u0026\u0026`, `;;`, `|\u0026`, `\u003c(`, `\u003c\u003c\u003c`, `\u003e\u003e`, `\u003e\u0026`, `\u003c\u0026`, `\u0026`, `;`, `(`, `)`, `|`, `\u003c`, `\u003e`). Anything else throws `TypeError`. This is the direct fix for the reported issue and removes the entire class of `.op` injection.\n- **`{ op: \u0027glob\u0027, pattern }`** \u2014 `.pattern` must be a string with no line terminators. Glob metacharacters (`*`, `?`, `[`, `]`, `{`, `}`, `,`) pass through; all other shell-special characters are backslash-escaped. (Previously the pattern field was discarded entirely and the literal string `\\g\\l\\o\\b` was emitted \u2014 a latent bug, not security-relevant.)\n- **`{ comment }`** \u2014 `.comment` must be a string with no line terminators (line terminators would end the shell comment and resume command parsing \u2014 same injection shape).\n- **Any other object shape** \u2014 `TypeError`.\n\nThe fix is allowlist-based rather than a targeted regex tweak, so it closes the reported vector and forecloses adjacent ones (U+2028 / U+2029 line separators in `.op`, line terminators in comments, unknown-shape objects coerced through `.replace`).\n\n### Workarounds\n\nPrior to upgrading, callers that build object tokens from untrusted input should validate `.op` against the parser\u0027s operator set themselves, and never construct `{ op }` from attacker-controlled strings.\n\n### Credits\n\nReported by Akshat Sinha",
  "id": "GHSA-w7jw-789q-3m8p",
  "modified": "2026-06-09T14:27:15Z",
  "published": "2026-06-09T14:27:15Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ljharb/shell-quote/security/advisories/GHSA-w7jw-789q-3m8p"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-9277"
    },
    {
      "type": "WEB",
      "url": "https://github.com/ljharb/shell-quote/commit/1518179"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ljharb/shell-quote"
    },
    {
      "type": "WEB",
      "url": "https://www.npmjs.com/package/shell-quote"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2026/05/23/2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "shell-quote quote() does not escape newlines in object .op values"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-9277 (GCVE-0-2026-9277)

FKIE_CVE-2026-9277

GHSA-W7JW-789Q-3M8P

Summary

Impact

PoC

Patch

Workarounds

Credits

Tags

Sightings

Nomenclature