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.
Published: 2024-10-25
Score: 6.3 Medium
EPSS: 1.4% Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
EUVD EUVD EUVD-2024-3031 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.
Github GHSA Github GHSA GHSA-f9vj-2wh5-fj8j Werkzeug safe_join not safe on Windows
History

Wed, 03 Dec 2025 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft
Microsoft windows
Palletsprojects
Palletsprojects werkzeug
CPEs cpe:2.3:a:palletsprojects:werkzeug:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft windows
Palletsprojects
Palletsprojects werkzeug
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

 cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

Fri, 11 Jul 2025 13:45:00 +0000

Type Values Removed Values Added
Metrics epss

{'score': 0.00039}

 epss

{'score': 0.00044}

Fri, 31 Jan 2025 15:30:00 +0000

Type Values Removed Values Added
References

Sat, 26 Oct 2024 01:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'}

threat_severity

Moderate

Fri, 25 Oct 2024 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Fri, 25 Oct 2024 19:30:00 +0000

Type Values Removed Values Added
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.
Title Werkzeug safe_join not safe on Windows
Weaknesses CWE-22
References
Metrics cvssV4_0

{'score': 6.3, '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'}

Subscriptions

Microsoft Windows
Palletsprojects Werkzeug
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2025-01-31T15:02:48.308Z

Reserved: 2024-10-18T13:43:23.457Z

Link: CVE-2024-49766

cve-icon Vulnrichment

Updated: 2025-01-31T15:02:48.308Z

cve-icon NVD

Status : Analyzed

Published: 2024-10-25T20:15:04.410

Modified: 2025-12-03T15:29:37.613

Link: CVE-2024-49766

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-10-25T19:22:36Z

Links: CVE-2024-49766 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses