Vulnerability-Lookup

GHSA-HF82-6JFF-F22V

Vulnerability from github – Published: 2026-07-03 09:31 – Updated: 2026-07-03 09:31

Details

libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup.

An easy handle that first uses default native CA trust can continue trusting the native platform store after the application switches that same handle to custom CA material for a later transfer.

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-11564"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-03T07:16:23Z",
    "severity": null
  },
  "details": "libcurl keeps previously used connections in a connection pool for subsequent\ntransfers to reuse if one of them matches the setup.\n\nAn easy handle that first uses default native CA trust can continue trusting\nthe native platform store after the application switches that same handle to\ncustom CA material for a later transfer.",
  "id": "GHSA-hf82-6jff-f22v",
  "modified": "2026-07-03T09:31:25Z",
  "published": "2026-07-03T09:31:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-11564"
    },
    {
      "type": "WEB",
      "url": "https://hackerone.com/reports/3788984"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-11564.html"
    },
    {
      "type": "WEB",
      "url": "https://curl.se/docs/CVE-2026-11564.json"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-11564 (GCVE-0-2026-11564)

Vulnerability from cvelistv5 – Published: 2026-07-03 06:12 – Updated: 2026-07-03 06:12

Title

Native CA trust persist

Summary

libcurl keeps previously used connections in a connection pool for subsequent transfers to reuse if one of them matches the setup. An easy handle that first uses default native CA trust can continue trusting the native platform store after the application switches that same handle to custom CA material for a later transfer.

Severity ?

No CVSS data available.

CWE

CWE-295 Improper Certificate Validation

Assigner

curl

References

URL

Tags

	https://curl.se/docs/CVE-2026-11564.json
	https://curl.se/docs/CVE-2026-11564.html
	https://hackerone.com/reports/3788984

Impacted products

	Vendor	Product	Version
	curl	curl	Affected: 8.20.0 , ≤ 8.20.0 (semver) Affected: 8.19.0 , ≤ 8.19.0 (semver) Affected: 8.18.0 , ≤ 8.18.0 (semver) Affected: 8.17.0 , ≤ 8.17.0 (semver)

Credits

Filipe Casal of Trail of Bits in collaboration with OpenAI Stefan Eissing

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "curl",
          "vendor": "curl",
          "versions": [
            {
              "lessThanOrEqual": "8.20.0",
              "status": "affected",
              "version": "8.20.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.19.0",
              "status": "affected",
              "version": "8.19.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.18.0",
              "status": "affected",
              "version": "8.18.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "8.17.0",
              "status": "affected",
              "version": "8.17.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Filipe Casal of Trail of Bits in collaboration with OpenAI"
        },
        {
          "lang": "en",
          "type": "remediation developer",
          "value": "Stefan Eissing"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "libcurl keeps previously used connections in a connection pool for subsequent\ntransfers to reuse if one of them matches the setup.\n\nAn easy handle that first uses default native CA trust can continue trusting\nthe native platform store after the application switches that same handle to\ncustom CA material for a later transfer."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-295 Improper Certificate Validation",
              "lang": "en"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-03T06:12:35.251Z",
        "orgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
        "shortName": "curl"
      },
      "references": [
        {
          "name": "json",
          "url": "https://curl.se/docs/CVE-2026-11564.json"
        },
        {
          "name": "www",
          "url": "https://curl.se/docs/CVE-2026-11564.html"
        },
        {
          "name": "issue",
          "url": "https://hackerone.com/reports/3788984"
        }
      ],
      "title": "Native CA trust persist"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "2499f714-1537-4658-8207-48ae4bb9eae9",
    "assignerShortName": "curl",
    "cveId": "CVE-2026-11564",
    "datePublished": "2026-07-03T06:12:35.251Z",
    "dateReserved": "2026-06-08T08:22:50.089Z",
    "dateUpdated": "2026-07-03T06:12:35.251Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-HF82-6JFF-F22V

CVE-2026-11564 (GCVE-0-2026-11564)

Tags

Sightings

Nomenclature