CVE-2026-22702: Virtualenv

Medium severity, CVSS 4.5. EPSS: 0.1% chance of exploitation in the next 30 days.

virtualenv is a tool for creating isolated virtual python environments. Prior to version 20.36.1, TOCTOU (Time-of-Check-Time-of-Use) vulnerabilities in virtualenv allow local attackers to perform symlink-based attacks on directory creation operations. An attacker with local access can exploit a race condition between directory existence checks and creation to redirect virtualenv's app_data and lock file operations to attacker-controlled locations. This issue has been patched in version 20.36.1.

Affected products

• Virtualenv Virtualenv: before 20.36.1 (fixed in 20.36.1)

Published 2026-01-10. Last modified 2026-06-17.