GHSA-f9vj-2wh5-fj8j

Werkzeug safe_join not safe on Windows

Source: GitHub Advisory Database (reviewed) Moderate CVE-2024-49766

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	Werkzeug	< 3.0.6	3.0.6

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.

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 web
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