CVSS 3.1
4.5 mediumCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:LCVE-2026-22702
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.
Severity
- EPSS
- 0.1% chance of exploitation in the next 30 days; higher than 0% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-59, CWE-362
- Published
- Modified
- Record from
- the NVD, synced
Affected
- virtualenv:virtualenv
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-597g-3phw-6986 | PyPI | virtualenv | <20.36.1 | 20.36.1 |
| PYSEC-2026-2009 | PyPI | virtualenv | <20.36.1 | 20.36.1 |