PYSEC-2026-2045
Werkzeug safe_join not safe on Windows
At a glance
- Published
- Updated
- CVE
- CVE-2024-49766
- Aliases
- GHSA-f9vj-2wh5-fj8j
- CVSS_V4
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Description
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.
Affected packages
| Package | Versions |
|---|---|
| PyPI · werkzeug | introduced 0, fixed 3.0.6 |
References
- https://github.com/pallets/werkzeug/security/advisories/GHSA-f9vj-2wh5-fj8j WEB
- https://nvd.nist.gov/vuln/detail/CVE-2024-49766 ADVISORY
- https://github.com/pallets/werkzeug/commit/2767bcb10a7dd1c297d812cc5e6d11a474c1f092 FIX
- https://github.com/pallets/werkzeug PACKAGE
- https://github.com/pallets/werkzeug/releases/tag/3.0.6 WEB
- https://security.netapp.com/advisory/ntap-20250131-0005 WEB
- https://pypi.org/project/werkzeug PACKAGE
- https://github.com/advisories/GHSA-f9vj-2wh5-fj8j ADVISORY
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — PyPA Advisory Database |