Insecure Temporary File Affecting virtualenv package, versions [21.14.8,21.14.10)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-VIRTUALENV-21282512
- published21 Oct 2026
- disclosed20 Oct 2026
- creditUnknown
Introduced: 20 Oct 2026
NewCVE-2026-113713 (opens in a new tab)How to fix?
Upgrade virtualenv to version 21.14.10 or higher.
Overview
Affected versions of this package are vulnerable to Insecure Temporary File via the FromAppData seeder in src/virtualenv/seed/embed/via_app_data/via_app_data.py when --symlink-app-data is used with a transient (temporary) app-data directory. Because the app-data directory is removed after virtualenv creation, symlinks placed into the new environment point to a now-deleted location, allowing a local attacker who can recreate that path to substitute malicious content and achieve arbitrary file writes into the virtual environment's site-packages.