CVE-2026-113720 (GCVE-0-2026-113720)
Vulnerability from cvelistv5
Published
2026-10-20 19:43
Modified
2026-10-21 15:52
Severity ?
4.4 (Medium) - 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
CWE
  • CWE-732 - Incorrect Permission Assignment for Critical Resource
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 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.
References
Impacted products
Vendor Product Version
pypa virtualenv Version: < 21.14.9
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