VULNERABILITY INTELLIGENCE
CVE-2026-115586
EPSS probability0.27%
CISA KEVNot currently listed
Published2026-10-23
Last modified2026-10-26
Description
virtualenv is a tool for creating isolated virtual python environments. From 21.14.9 until 21.14.13, the bash bin/activate script can copy an attacker-controlled --prompt value into PS1 without escaping dollar signs or backticks when both promptvars and POSIX mode are disabled during activation. Re-enabling promptvars, running set -o posix, or starting an interactive child bash that inherits the exported PS1 can then expand command substitution in the stored VIRTUAL_ENV_PROMPT value and execute commands as the user who activates the environment. This issue is fixed in version 21.14.13.
Weakness classification
- security-advisories@github.com: CWE-78