CVE-2026-113716

NameCVE-2026-113716
Descriptionvirtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the builtin creator calls ensure_dir() for executable, library, and package directories, and ensure_dir() accepts an existing symlink to a directory because exists() follows it. Interpreter creation, seed installation, and activation generation then write through the linked parent outside the requested destination when another local account prepared the tree and the invoking user can access the target. The --clear option removes the planted tree first, while ordinary creation reaches it; arbitrary attacker-selected output bytes are not established. This issue is fixed in version 21.14.9.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
python-virtualenv (PTS)bookworm20.17.1+ds-1vulnerable
trixie20.31.2+ds-1+deb13u1vulnerable
forky, sid21.5.1+ds-1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
python-virtualenvsource(unstable)(unfixed)

Notes

https://github.com/pypa/virtualenv/security/advisories/GHSA-cw65-gx24-rc82
https://github.com/pypa/virtualenv/pull/3429
Fixed by: https://github.com/pypa/virtualenv/commit/554d9f9d4f7758f5cf53f993031e29787f1f74c5 (21.14.9)

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