CVE-2026-113715virtualenv: Venv configuration readback can reinterpret path boundaries
Updated under an hour ago ()
Does this affect you?
It affects pypa virtualenv. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the stdlib venv creator reads generated pyvenv.cfg with str.splitlines() and merges parsed keys over virtualenv's selected configuration. An untrusted caller who influences the destination pathname can include a line-boundary character such as U+2028 to inject keys including home and include-system-site-packages, causing path data to change configuration structure before final output. Setting include-system-site-packages to true weakens environment isolation, while an altered home can change which standard-library files the interpreter loads if the attacker also controls that location. The builtin creator does not use this readback path. This issue is fixed in version 21.14.9.
- CVSS
- 2.0 LOW (v4.0, CNA)CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-93
- 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-qmx5-4p3x-wvqfx-refsource-confirm
- https://github.com/pypa/virtualenv/pull/3426x-refsource-misc
- https://github.com/pypa/virtualenv/commit/b0008a58885ded9227faf8f910c6c402712c750ax-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.