BIT-virtualenv-2026-113726
See a problem?- Import Source
- https://github.com/bitnami/vulndb/tree/main/data/virtualenv/BIT-virtualenv-2026-113726.json
- JSON Data
- https://api.osv.dev/v1/vulns/BIT-virtualenv-2026-113726
- Aliases
- Published
- 2026-10-29T09:00:43Z
- Modified
- 2026-10-29T10:55:33Z
- Summary
- virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST
- Details
-
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.13.0, the bash activate script that zsh also sources leaves the environment name unescaped; from 21.13.0 until 21.14.4, it escapes backslashes, dollar signs, and backticks only when BASH_VERSION is set, so zsh receives the raw value. The script assigns that value to PS1. In zsh with PROMPT_SUBST, an attacker-influenced environment directory, --prompt, or VIRTUALENV_PROMPT value containing command, parameter, or arithmetic expansion syntax can therefore execute commands in the user's shell each time the prompt is drawn. A percent sign is separately interpreted as a zsh prompt escape but does not by itself execute commands. Plain zsh with PROMPT_SUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.
- Database specific
{ "cpes": [ "cpe:2.3:a:virtualenv:virtualenv:*:*:*:*:*:python:*:*" ], "severity": "High" }- References
Affected packages
Bitnami / virtualenv
Package
- Name
- virtualenv
- Purl
- pkg:bitnami/virtualenv
Severity
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator