CVE-2026-115586

high

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.

References

https://github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc

https://github.com/pypa/virtualenv/releases/tag/21.14.13

https://github.com/pypa/virtualenv/pull/3466

https://github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5f4

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-109131

Details

Source: Mitre, NVD

Published: 2026-10-23

Updated: 2026-10-26

Named Vulnerability: GHSA-cx6f-vjhg-g3cc

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 7.1

Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: High

EPSS

EPSS: 0.00271