CVE-2026-113732 — virtualenv activate.fish runs commands from a path or prompt with a backslash before a quote
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() eve…
Published: 2026-10-20 · CVSS: 7.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7