{"id":"CVE-2026-113720","summary":"virtualenv: Seeded files retain permissions from an older cache","details":"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 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.","aliases":["GHSA-fc2g-4w5p-6whm"],"modified":"2026-10-22T02:30:17.923423480Z","published":"2026-10-20T19:43:32.451Z","database_specific":{"cwe_ids":["CWE-732"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113720.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/113xxx/CVE-2026-113720.json"},{"type":"FIX","url":"https://github.com/pypa/virtualenv/commit/35f0b33562790176dd186d0a3c517af3acc7a0e1"},{"type":"FIX","url":"https://github.com/pypa/virtualenv/pull/3425"},{"type":"WEB","url":"https://github.com/pypa/virtualenv/releases/tag/21.14.9"},{"type":"ADVISORY","url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-fc2g-4w5p-6whm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-113720"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/pypa/virtualenv","events":[{"introduced":"0"},{"fixed":"e53e30b9c8fbc3f4f502223819449ddc970fbbe8"},{"fixed":"35f0b33562790176dd186d0a3c517af3acc7a0e1"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"21.14.9"}],"source":"AFFECTED_FIELD","strategy":"StringRangeExpression"},{"range":[{"fixed":"35f0b33562790176dd186d0a3c517af3acc7a0e1"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_TAG","original_tag":"21.14.9","range":[{"fixed":"e53e30b9c8fbc3f4f502223819449ddc970fbbe8"}]}]}}],"versions":["21.14.8","21.14.7","21.14.6","21.14.5","21.14.4","21.14.3","21.14.2","21.14.1","21.14.0","21.13.0","21.12.1","21.12.0","21.11.1","21.11.0","21.10.0","21.9.1","21.9.0","21.8.1","21.8.0","21.7.16","21.7.15","21.7.14","21.7.13","21.7.12","21.7.11","21.7.10","21.7.9","21.7.8","21.7.7","21.7.6","21.7.5","21.7.4","21.7.3","21.7.2","21.7.1","21.7.0","21.6.1","21.6.0","21.5.2","21.5.1","21.5.0","21.4.3","21.4.2","21.4.1","21.4.0","21.3.3","21.3.2","21.3.1","21.3.0","21.2.4","21.2.3","21.2.2","21.2.1","21.2.0","21.1.0","21.0.0","20.39.1","20.39.0","20.38.0","20.37.0","20.27.3","20.27.2","20.24.3","20.3.0","20.0.32","20.0.7","20.0.0b2","20.0.0b1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-113720.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}