CVE-2026-113720virtualenv: Seeded files retain permissions from an older cache
Updated under an hour ago ()
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It affects pypa virtualenv. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 4.4 MEDIUM (v4.0, CNA)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
- Weakness (CWE)
- CWE-732
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Received
- Record last updated
- Oct 20, 2026
- First seen by InfoSec Signals
- Oct 20, 2026
Affected products
pypa virtualenv pypa:virtualenv (from the name) | before 21.14.9 | CNA record |
References
- https://github.com/pypa/virtualenv/security/advisories/GHSA-fc2g-4w5p-6whmx-refsource-confirm
- https://github.com/pypa/virtualenv/pull/3425x-refsource-misc
- https://github.com/pypa/virtualenv/commit/35f0b33562790176dd186d0a3c517af3acc7a0e1x-refsource-misc
- https://github.com/pypa/virtualenv/releases/tag/21.14.9x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.