{"id":"CVE-2026-113714","title":"virtualenv: Downloaded wheel selection and caching precede verification","summary":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, download_wheel() writes package-index downloads directly into the reusable wheel/house cache before selecting a verification target from pip's text…","severity":"low","cvss":2.3,"cvssVector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-354"],"vendor":"pypa","product":"virtualenv","affected":["virtualenv < 21.14.9"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T19:19:51.080Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113714","references":[{"url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-494p-63j8-28p3","label":"https://github.com/pypa/virtualenv/security/advisories/GHSA-494p-63j8-28p3"},{"url":"https://github.com/pypa/virtualenv/pull/3430","label":"https://github.com/pypa/virtualenv/pull/3430"},{"url":"https://github.com/pypa/virtualenv/commit/7babec66e043e1cc8bc66869a063653898719d96","label":"https://github.com/pypa/virtualenv/commit/7babec66e043e1cc8bc66869a063653898719d96"},{"url":"https://github.com/pypa/virtualenv/releases/tag/21.14.9","label":"https://github.com/pypa/virtualenv/releases/tag/21.14.9"}],"tags":["cve.org"],"ingestedAt":"2026-10-20T20:18:14.541Z","slug":"CVE-2026-113714","body":"## Overview\n\nvirtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, download_wheel() writes package-index downloads directly into the reusable wheel/house cache before selecting a verification target from pip's textual Saved output. With default-index digest comparison enabled, a controlled package index can inject a misleading Saved line through a discarded link's data-requires-python attribute; this forged-line variant also requires knowledge of an absolute path to the genuine bundled wheel. The wrong path can then be hashed, while a digest mismatch leaves the rejected archive in the cache for later selection without verification. A separate rejected-cache-file variant requires control over downloaded data or archive selection but not the forged-line prerequisites. Explicit custom-index exceptions are outside the promised PyPI comparison, and the issue does not independently bypass TLS or establish control of default PyPI. This issue is fixed in version 21.14.9.\n\n## Affected\n\n- `virtualenv < 21.14.9`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":13,"depthScoreParts":{"impact":12.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}