CVE-2024-49766: Palletsprojects Werkzeug

Medium severity, CVSS 5.3. EPSS: 0.8% chance of exploitation in the next 30 days.

Werkzeug is a Web Server Gateway Interface web application library. On Python < 3.11 on Windows, os.path.isabs() does not catch UNC paths like //server/share. Werkzeug's safe_join() relies on this check, and so can produce a path that is not safe, potentially allowing unintended access to data. Applications using Python >= 3.11, or not using Windows, are not vulnerable. Werkzeug version 3.0.6 contains a patch.

Affected products

• Palletsprojects Werkzeug: before 3.0.6 (fixed in 3.0.6)

Published 2024-10-25. Last modified 2026-06-17.