{
  "cveId": "CVE-2026-113726",
  "url": "https://patchblox.com/security/cve/CVE-2026-113726",
  "summary": "CVE-2026-113726 is fixed in 2 products on 1 platform, first by ALAS2023-2026-3409, released November 10, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "python3.13-virtualenv: virtualenv is a tool for creating isolated virtual python environments",
  "description": "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\u0027s 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.",
  "published": "2026-11-09T09:00:00Z",
  "severity": "important",
  "epss": 0.00345,
  "epssPercentile": 0.28384,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python3-virtualenv",
      "release": "amzn 2023",
      "fixedVersion": "20.4.0-3.amzn2023.0.6",
      "fix": "ALAS2023-2026-3409",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3409",
      "released": "2026-11-10T03:55:23Z"
    },
    {
      "platform": "linux",
      "product": "python3.13-virtualenv",
      "release": "amzn 2023",
      "fixedVersion": "20.21.1-1.amzn2023.0.5",
      "fix": "ALAS2023-2026-3410",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3410",
      "released": "2026-11-10T03:55:23Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-11T13:47:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}