CVE-2026-115586

Name	CVE-2026-115586
Description	virtualenv is a tool for creating isolated virtual python environments. From 21.14.9 until 21.14.13, the bash bin/activate script can copy an attacker-controlled --prompt value into PS1 without escaping dollar signs or backticks when both promptvars and POSIX mode are disabled during activation. Re-enabling promptvars, running set -o posix, or starting an interactive child bash that inherits the exported PS1 can then expand command substitution in the stored VIRTUAL_ENV_PROMPT value and execute commands as the user who activates the environment. This issue is fixed in version 21.14.13.
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)

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	fixed
	forky, sid	21.5.1+ds-1	fixed

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

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

Notes

- python-virtualenv <not-affected> (Vulnerable code introduced later)
https://github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc
https://github.com/pypa/virtualenv/pull/3466
Fixed by: https://github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5f4 (21.14.13)