CVE-2026-102925

Name	CVE-2026-102925
Description	virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.13, the generated activate (bash and zsh) and activate.fish scripts place values already escaped by shlex.quote inside an additional quoted context. In the bash and zsh script, a crafted virtual environment path reaches __VIRTUAL_ENV__ when a relocated environment's recorded directory is absent; in the fish script, crafted Tcl or Tk library paths reach __TCL_LIBRARY__ or __TK_LIBRARY__. The surplus quotes can terminate the data-only quoted run and leave shell metacharacters parsed as commands when a user sources the activation script, allowing code execution with that user's privileges. This issue is fixed in version 21.7.13.
Source	CVE (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 Bugs	1149650

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-virtualenv (PTS)	bookworm	20.17.1+ds-1	fixed
	trixie	20.31.2+ds-1+deb13u1	vulnerable
	forky, sid	21.5.1+ds-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-virtualenv	source	bookworm	(not affected)
python-virtualenv	source	(unstable)	(unfixed)			1149650

Notes

[trixie] - python-virtualenv <no-dsa> (Minor issue)
[bookworm] - python-virtualenv <not-affected> (Vulnerable code introduced in 20.33.0)
https://github.com/pypa/virtualenv/security/advisories/GHSA-p58f-9548-mpm2
https://github.com/pypa/virtualenv/pull/3252
Fixed by: https://github.com/pypa/virtualenv/commit/4d5a105ec2a2723b8c7f4571bb68f4f71d01e3f6 (21.7.13)