SB20261109209 - OS Command Injection in py3-virtualenv

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Main Vulnerability Database SB20261109209

SB20261109209 - OS Command Injection in py3-virtualenv

Published: November 9, 2026

Security Bulletin ID SB20261109209
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) OS Command Injection (CVE-ID: CVE-2026-113725)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an unprivileged local attacker to execute arbitrary commands with the privileges of a user who activates an attacker-influenced environment.

The vulnerability exists due to incomplete escaping of environment names in virtualenv's Bash activation script when a backslash precedes a dollar sign. An unprivileged local attacker can manipulate the environment name so commands execute whenever Bash renders the prompt after a non-root user sources the environment's activation script.


Remediation

Install update from vendor's website.

References