CVE-2024-49766: Werkzeug safe_join not safe on Windows
First published: Fri Oct 25 2024(Updated: )
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.
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| pip/Werkzeug | <=3.0.5 | 3.0.6 |
| IBM Storage Defender Resiliency Service | <=2.0.0 - 2.0.9 |
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Reference Links
- 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
- https://nvd.nist.gov/vuln/detail/CVE-2024-49766
- https://github.com/advisories/GHSA-f9vj-2wh5-fj8j (Advisory)
- https://www.ibm.com/support/pages/node/7178587 (Advisory)
- https://security.netapp.com/advisory/ntap-20250131-0005/
- https://security.netapp.com/advisory/ntap-20250131-0005
Frequently Asked Questions
What is the severity of CVE-2024-49766?
CVE-2024-49766 has a moderate severity due to potential data access issues caused by unsafe path handling.
How do I fix CVE-2024-49766?
To fix CVE-2024-49766, update Werkzeug to version 3.0.6 or higher.
Who is affected by CVE-2024-49766?
CVE-2024-49766 affects applications using Werkzeug versions up to 3.0.5 and Python versions prior to 3.11 on Windows.
What does CVE-2024-49766 exploit?
CVE-2024-49766 exploits a vulnerability in the `os.path.isabs()` function failing to catch UNC paths.
Is there a workaround for CVE-2024-49766?
A workaround for CVE-2024-49766 is to avoid using Werkzeug's `safe_join()` with UNC paths until a proper patch is applied.
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