CRLF injection in py3-virtualenv - CVE-2026-113715
Published: November 9, 2026
Vulnerability identifier: #VU163151
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-113715
CWE-ID: CWE-93
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an untrusted caller to alter virtual environment settings and weaken environment isolation.
The vulnerability exists due to virtualenv interpreting line-boundary characters in destination paths as configuration boundaries when reading pyvenv.cfg with the non-default venv creator. An untrusted caller can supply a crafted destination path to inject home and include-system-site-packages settings, changing the interpreter's home directory and enabling access to system packages.
Affected software
py3-virtualenv
How to mitigate CVE-2026-113715
Install security update from vendor's website.
py3-virtualenv - update to 21.14.9