CVE-2026-113725CWE-116CWE-78command-injection

CVE-2026-113725

High · published October 21, 2026

CVSS v3.1
7.8
EPSS
0%
Percentile
4.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00155 · 4.2th percentile
Weaknesses
CWE-116 · Improper Encoding or Escaping of Output; CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-10-21T00:17Z
References (3)
https://github.com/pypa/virtualenv/commit/c3104e02474b652832a9bbaae79f6e1696296932 · [email protected]https://github.com/pypa/virtualenv/releases/tag/21.14.7 · [email protected]https://github.com/pypa/virtualenv/security/advisories/GHSA-vxj4-q4g9-crj7 · [email protected]
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 20 OCT 19:56Z
    virtualenv bash activate runs commands from an environment name with a backslash before $
    cvelistv5
  • 20 OCT 19:56Z
    virtualenv bash activate runs commands from an environment name with a backslash before $
    cvelistv5