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Moderate severityNVD Advisory· Published Oct 25, 2024· Updated Jan 31, 2025

Werkzeug safe_join not safe on Windows

CVE-2024-49766

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.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
WerkzeugPyPI
< 3.0.63.0.6

Affected products

62

Patches

Vulnerability mechanics

References

6

News mentions

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