FKIE_CVE-2026-113722

Vulnerability from fkie_nvd - Published: 2026-10-20 20:17 - Updated: 2026-10-22 16:47
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Summary
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, virtualenv's ScriptMakerCustom and pip pass an incompletely quoted interpreter path to distlib ScriptMaker when generating POSIX console scripts. When the path contains a space or produces a shebang longer than 127 bytes, distlib emits a /bin/sh wrapper whose double-quoted interpreter path still expands command substitutions and backticks. An attacker who influences the environment destination can therefore execute commands with the user's privileges when the user later runs a generated launcher; environment creation and activation do not trigger the command. Existing launchers are not repaired by upgrading virtualenv alone and must be regenerated, while a later independent pip installation or upgrade can reintroduce an affected launcher because pip's vendored distlib is unchanged. The virtualenv fix is released in version 21.14.9.
References
security-advisories@github.comhttps://github.com/pypa/virtualenv/commit/2519941bed33ee0d3ac99277f67913e439e476a9
security-advisories@github.comhttps://github.com/pypa/virtualenv/pull/3417
security-advisories@github.comhttps://github.com/pypa/virtualenv/releases/tag/21.14.9
security-advisories@github.comhttps://github.com/pypa/virtualenv/security/advisories/GHSA-c978-59m8-c77v
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "virtualenv",
          "vendor": "pypa",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 21.14.9"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, virtualenv\u0027s ScriptMakerCustom and pip pass an incompletely quoted interpreter path to distlib ScriptMaker when generating POSIX console scripts. When the path contains a space or produces a shebang longer than 127 bytes, distlib emits a /bin/sh wrapper whose double-quoted interpreter path still expands command substitutions and backticks. An attacker who influences the environment destination can therefore execute commands with the user\u0027s privileges when the user later runs a generated launcher; environment creation and activation do not trigger the command. Existing launchers are not repaired by upgrading virtualenv alone and must be regenerated, while a later independent pip installation or upgrade can reintroduce an affected launcher because pip\u0027s vendored distlib is unchanged. The virtualenv fix is released in version 21.14.9."
    }
  ],
  "id": "CVE-2026-113722",
  "lastModified": "2026-10-22T16:47:38.403",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-10-20T20:17:18.810",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/pypa/virtualenv/commit/2519941bed33ee0d3ac99277f67913e439e476a9"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/pypa/virtualenv/pull/3417"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/pypa/virtualenv/releases/tag/21.14.9"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/pypa/virtualenv/security/advisories/GHSA-c978-59m8-c77v"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-78"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}



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