CVE-2026-113725

virtualenv bash activate runs commands from an environment name with a backslash before $

State: Published
Severity: 7.8 High
Published: Oct 20, 2026
Updated: Oct 21, 2026
Reserved: Oct 20, 2026

Description

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.7, the bash activate script escapes the environment name for only one of the two passes bash makes over PS1, so a backslash in the name undoes the escaping and a name containing \$(...) runs as commands in the user's shell each time bash draws the prompt. This issue is fixed in version 21.14.7.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	GitHub_M

Weaknesses

CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-116 Improper Encoding or Escaping of Output

Affected Products

Product	Versions
virtualenvpypa	< 21.14.7Affected

References

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