{"id":"CVE-2026-113720","title":"virtualenv: Seeded files retain permissions from an older cache","summary":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the app-data copy seeder uses shutil.copy() to copy cached package files into later environments, causing cached source modes to override the curre…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N","cvssSource":"cna","cwe":["CWE-732"],"vendor":"pypa","product":"virtualenv","affected":["virtualenv < 21.14.9"],"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T19:43:32.451Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113720","references":[{"url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-fc2g-4w5p-6whm","label":"https://github.com/pypa/virtualenv/security/advisories/GHSA-fc2g-4w5p-6whm"},{"url":"https://github.com/pypa/virtualenv/pull/3425","label":"https://github.com/pypa/virtualenv/pull/3425"},{"url":"https://github.com/pypa/virtualenv/commit/35f0b33562790176dd186d0a3c517af3acc7a0e1","label":"https://github.com/pypa/virtualenv/commit/35f0b33562790176dd186d0a3c517af3acc7a0e1"},{"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":"2026-10-20T20:18:14.532Z","slug":"CVE-2026-113720","body":"## Overview\n\nvirtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the app-data copy seeder uses shutil.copy() to copy cached package files into later environments, causing cached source modes to override the current run's umask. A cache populated under a permissive umask can therefore produce files writable by another local account in a later traversable environment, allowing package code such as pip/__init__.py to be modified and executed by the environment owner. The attacker cannot force the earlier umask, and a private destination parent prevents access. 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":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}