Description

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.

Classification

CVE ID: CVE-2024-49766

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.3

CVSS Vector: 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

Affected Products

Vendor: pallets

Product: werkzeug

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 18.25% (scored less or equal to compared to others)

EPSS Date: 2025-03-01 (when was this score calculated)

References

https://github.com/pallets/werkzeug/security/advisories/GHSA-f9vj-2wh5-fj8j
https://github.com/pallets/werkzeug/commit/2767bcb10a7dd1c297d812cc5e6d11a474c1f092
https://github.com/pallets/werkzeug/releases/tag/3.0.6

Timeline