CVE-2026-113732
Published:October 20, 2026
Updated:October 21, 2026
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
virtualenv (CONDA):
Affected version(s) >=21.0.0 <21.14.2Fix Suggestion:
Update to version 21.14.2https://github.com/pypa/virtualenv.git (GITHUB):
Affected version(s) >=21.0.0 <21.14.2Fix Suggestion:
Update to version 21.14.2virtualenv (PYTHON):
Affected version(s) >=21.0.0 <21.14.2Fix Suggestion:
Update to version 21.14.2Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.5
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.8
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH