OS Command Injection in py3-virtualenv - CVE-2026-113722
Published: November 9, 2026
Vulnerability identifier: #VU163144
CSH Severity: High
CVSS v4: 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]
CVE-ID: CVE-2026-113722
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an unprivileged local attacker to execute commands with the privileges of a user running a generated virtualenv launcher.
The vulnerability exists due to insufficient quoting of destination-derived interpreter paths in POSIX console launchers when spaces or long shebangs require a shell wrapper. An unprivileged local attacker can influence the environment destination to include shell substitutions that execute when the user subsequently runs the generated launcher.
Affected software
py3-virtualenv
How to mitigate CVE-2026-113722
Install security update from vendor's website.
py3-virtualenv - update to 21.14.9