Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5
- https://github.com/pypa/virtualenv/pull/3466
- https://github.com/pypa/virtualenv/releases/tag/21.14.13
- https://github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc
FAQ
What is CVE-2026-115586?
CVE-2026-115586 is a documented vulnerability. 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 escapi...
How severe is CVE-2026-115586?
CVSS scoring is not yet available for CVE-2026-115586. Check NVD for updates.
Is there a patch for CVE-2026-115586?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.