high7.8
CVE-2026-113732
virtualenv activate.fish runs commands from a path or prompt with a backslash before a quote
Impact
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() even though fish interprets backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or VIRTUALENV_PROMPT value containing a backslash before a quote can therefore terminate the generated fish literal and execute command substitution when the user sources activate.fish. This issue is fixed in version 21.14.2.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | virtualenv | <= 21.14.1 | 21.14.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-c947-3pg5-gm8q
- https://github.com/pypa/virtualenv/security/advisories/GHSA-c947-3pg5-gm8q
- https://nvd.nist.gov/vuln/detail/CVE-2026-113732
- https://github.com/pypa/virtualenv/commit/3bddeaf8d02c3ee7f576503efb082f8f494cfcab
- https://github.com/pypa/virtualenv/releases/tag/21.14.2