CVE-2026-113732
High · 7.8CVSS
7.8
EPSS
0.2%
Published
Oct 20, 2026
CISA due date
—
The record
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 | Introduced | Fixed |
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