CVE-2026-113732 virtualenv - Command Injection

virtualenv prior to 21.14.2 contains a command injection caused by improper quoting in FishActivator.quote() using POSIX shlex.quote(), letting attackers execute command substitution via crafted environment variables when sourcing activate.fish.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
View the NVD record ↗

Details

Type
Command Injection
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
20 October 2026
Updated
21 October 2026
Weakness
CWE-78

Vendor fix

Update to version 21.14.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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