{"id":"CVE-2026-113716","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-113716","generatedAt":"2026-10-28T01:11:36.851Z","title":"Prior to 21.14.9, the builtin creator calls ensure_dir() for executable, library, and package directories, and ensure_dir() accepts an existing symlink to a directory because exists() follows it.","description":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the builtin creator calls ensure_dir() for executable, library, and package directories, and ensure_dir() accepts an existing symlink to a directory because exists() follows it. Interpreter creation, seed installation, and activation generation then write through the linked parent outside the requested destination when another local account prepared the tree and the invoking user can access the target. The --clear option removes the planted tree first, while ordinary creation reaches it; arbitrary attacker-selected output bytes are not established. This issue is fixed in version 21.14.9.","published":"2026-10-20T20:17:18.000Z","lastModified":"2026-10-22T16:47:38.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":4.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-59"],"affected":[],"epss":{"score":0.00144,"percentile":0.0364,"date":"2026-10-26","history":[{"date":"2026-10-21","score":0.00117,"percentile":0.01569}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T20:17:18.000Z","detail":{"score":"4.5","severity":"MEDIUM","publishedAt":"2026-10-20T20:17:17.850Z"},"summary":"New CVE, medium severity (CVSS 4.5)."}],"references":[{"url":"https://github.com/pypa/virtualenv/commit/554d9f9d4f7758f5cf53f993031e29787f1f74c5","source":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/pull/3429","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-cw65-gx24-rc82","source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-113716","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}