{"id":"PYSEC-2026-2045","summary":"Werkzeug safe_join not safe on Windows","details":"On Python \u003c 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 \u003e= 3.11, or not using Windows, are not vulnerable.","aliases":["CVE-2024-49766","GHSA-f9vj-2wh5-fj8j"],"modified":"2026-07-07T17:47:56.415783418Z","published":"2026-07-07T14:34:43.390514Z","references":[{"type":"WEB","url":"https://github.com/pallets/werkzeug/security/advisories/GHSA-f9vj-2wh5-fj8j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-49766"},{"type":"FIX","url":"https://github.com/pallets/werkzeug/commit/2767bcb10a7dd1c297d812cc5e6d11a474c1f092"},{"type":"PACKAGE","url":"https://github.com/pallets/werkzeug"},{"type":"WEB","url":"https://github.com/pallets/werkzeug/releases/tag/3.0.6"},{"type":"WEB","url":"https://security.netapp.com/advisory/ntap-20250131-0005"},{"type":"PACKAGE","url":"https://pypi.org/project/werkzeug"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-f9vj-2wh5-fj8j"}],"affected":[{"package":{"name":"werkzeug","ecosystem":"PyPI","purl":"pkg:pypi/werkzeug"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.0.6"}]}],"versions":["0.1","0.10","0.10.1","0.10.2","0.10.3","0.10.4","0.11","0.11.1","0.11.10","0.11.11","0.11.12","0.11.13","0.11.14","0.11.15","0.11.2","0.11.3","0.11.4","0.11.5","0.11.6","0.11.7","0.11.8","0.11.9","0.12","0.12.1","0.12.2","0.13","0.14","0.14.1","0.15.0","0.15.1","0.15.2","0.15.3","0.15.4","0.15.5","0.15.6","0.16.0","0.16.1","0.2","0.3","0.3.1","0.4","0.4.1","0.5","0.5.1","0.6","0.6.1","0.6.2","0.7","0.7.1","0.7.2","0.8","0.8.1","0.8.2","0.8.3","0.9","0.9.1","0.9.2","0.9.3","0.9.4","0.9.5","0.9.6","1.0.0","1.0.0rc1","1.0.1","2.0.0","2.0.0rc1","2.0.0rc2","2.0.0rc3","2.0.0rc4","2.0.0rc5","2.0.1","2.0.2","2.0.3","2.1.0","2.1.1","2.1.2","2.2.0","2.2.0a1","2.2.1","2.2.2","2.2.3","2.3.0","2.3.1","2.3.2","2.3.3","2.3.4","2.3.5","2.3.6","2.3.7","2.3.8","3.0.0","3.0.1","3.0.2","3.0.3","3.0.4","3.0.5"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/werkzeug/PYSEC-2026-2045.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"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"}]}