Time-of-check Time-of-use (TOCTOU) Race Condition in py3-virtualenv - CVE-2026-22702
Published: January 13, 2026
Vulnerability identifier: #VU121190
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-22702
CWE-ID: CWE-367
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: www.virtualenv.org
Affected software:
py3-virtualenv
py3-virtualenv
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition between directory existence checks and creation to redirect virtualenv's app_data and lock file operations to attacker-controlled locations. A local user can gain access to sensitive information, poison cache or perform a denial of service attack.
How to mitigate CVE-2026-22702
Install updates from vendor's website.