{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "21.14.4"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "5b915367da82bd024b2a0d28d2f98007034b4aa2"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "21.14.4",
                "range": [
                  {
                    "fixed": "6657c5876b2185fd3feb77c1f03ec58246321c36"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6657c5876b2185fd3feb77c1f03ec58246321c36"
            },
            {
              "fixed": "5b915367da82bd024b2a0d28d2f98007034b4aa2"
            }
          ],
          "repo": "https://github.com/pypa/virtualenv",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-5vjq-rrrf-7h2q"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-116",
      "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113726.json"
  },
  "details": "virtualenv is a tool for creating isolated virtual python environments. Prior to 21.13.0, the bash activate script that zsh also sources leaves the environment name unescaped; from 21.13.0 until 21.14.4, it escapes backslashes, dollar signs, and backticks only when BASH_VERSION is set, so zsh receives the raw value. The script assigns that value to PS1. In zsh with PROMPT_SUBST, an attacker-influenced environment directory, --prompt, or VIRTUALENV_PROMPT value containing command, parameter, or arithmetic expansion syntax can therefore execute commands in the user's shell each time the prompt is drawn. A percent sign is separately interpreted as a zsh prompt escape but does not by itself execute commands. Plain zsh with PROMPT_SUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.",
  "id": "CVE-2026-113726",
  "modified": "2026-10-21T10:30:56.621704966Z",
  "published": "2026-10-20T22:05:24.253Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113726.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pypa/virtualenv/commit/5b915367da82bd024b2a0d28d2f98007034b4aa2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pypa/virtualenv/releases/tag/21.14.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/pypa/virtualenv/security/advisories/GHSA-5vjq-rrrf-7h2q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113726"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST"
}