CVE-2026-113722

NameCVE-2026-113722
Descriptionvirtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, virtualenv's ScriptMakerCustom and pip pass an incompletely quoted interpreter path to distlib ScriptMaker when generating POSIX console scripts. When the path contains a space or produces a shebang longer than 127 bytes, distlib emits a /bin/sh wrapper whose double-quoted interpreter path still expands command substitutions and backticks. An attacker who influences the environment destination can therefore execute commands with the user's privileges when the user later runs a generated launcher; environment creation and activation do not trigger the command. Existing launchers are not repaired by upgrading virtualenv alone and must be regenerated, while a later independent pip installation or upgrade can reintroduce an affected launcher because pip's vendored distlib is unchanged. The virtualenv fix is released 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)
Debian Bugs1151685

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)1151685

Notes

https://github.com/pypa/virtualenv/security/advisories/GHSA-c978-59m8-c77v
https://github.com/pypa/virtualenv/pull/3417
Fixed by: https://github.com/pypa/virtualenv/commit/2519941bed33ee0d3ac99277f67913e439e476a9 (21.14.9)

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