Vulnerability-Lookup

GHSA-3934-423W-4JQ3

Vulnerability from github – Published: 2026-05-12 21:31 – Updated: 2026-05-19 15:39

Summary

HashiCorp Nomad vulnerable to symlink attack

Details

HashiCorp Nomad and Nomad Enterprise prior to 2.0.1 are vulnerable to arbitrary file read and write on the client host as the Nomad process user through a symlink attack. This vulnerability (CVE-2026-6959) is fixed in Nomad 2.0.1, 1.11.5 and 1.10.11.

Severity ?

6.0 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/hashicorp/nomad"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.11.0-rc.1.0.20260512123500-2a09fd62c238"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-6959"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-59"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-05-19T15:39:41Z",
    "nvd_published_at": "2026-05-12T20:16:46Z",
    "severity": "MODERATE"
  },
  "details": "HashiCorp Nomad and Nomad Enterprise prior to 2.0.1 are vulnerable to arbitrary file read and write on the client host as the Nomad process user through a symlink attack. This vulnerability (CVE-2026-6959) is fixed in Nomad 2.0.1, 1.11.5 and 1.10.11.",
  "id": "GHSA-3934-423w-4jq3",
  "modified": "2026-05-19T15:39:41Z",
  "published": "2026-05-12T21:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6959"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashicorp/nomad/commit/2a09fd62c23880ff306499ae03fe64628d82a23f"
    },
    {
      "type": "WEB",
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-14-nomad-arbitrary-file-read-write-on-client-host-through-symlink-attack/77416"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hashicorp/nomad"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashicorp/nomad/releases/tag/v2.0.1"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "HashiCorp Nomad vulnerable to symlink attack"
}

CVE-2026-6959 (GCVE-0-2026-6959)

Vulnerability from cvelistv5 – Published: 2026-05-12 18:59 – Updated: 2026-05-12 20:16

Title

Nomad vulnerable to arbitrary file read/write on client host through symlink attack

Summary

Severity ?

6 (Medium)


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

CWE

CWE-59 - Improper Link Resolution Before File Access (Link Following)

Assigner

HashiCorp

References

URL

Tags

https://discuss.hashicorp.com/t/hcsec-2026-14-nom…

Impacted products

Vendor

Product

Version

HashiCorp

Nomad

Affected: 0.9.0 , < 2.0.1 (semver)

HashiCorp

Nomad Enterprise

Affected: 0.9.0 , < 2.0.1 (semver)

Credits

This issue was identified by Alex Manson (Aiven / NeuroWinter).

Show details on NVD website

JSON

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                "role": "CISA Coordinator",
                "timestamp": "2026-05-12T20:14:14.584948Z",
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        }
      ],
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  "cveMetadata": {
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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

GHSA-3934-423W-4JQ3

CVE-2026-6959 (GCVE-0-2026-6959)

Tags

Sightings

Nomenclature