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.
https://security.netapp.com/advisory/ntap-20250131-0005/
https://github.com/pallets/werkzeug/security/advisories/GHSA-f9vj-2wh5-fj8j
https://github.com/pallets/werkzeug/releases/tag/3.0.6
https://github.com/pallets/werkzeug/commit/2767bcb10a7dd1c297d812cc5e6d11a474c1f092
Published: 2024-10-25
Updated: 2025-01-31
Base Score: 3.3
Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:P
Severity: Low
Base Score: 4.3
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Severity: Medium
Base Score: 6.9
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Severity: Medium
EPSS: 0.00152