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  5. CVE-2024-6866

CVE-2024-6866: Flask-CORS vulnerable to Improper Handling of Case Sensitivity

March 20, 2025 (updated March 21, 2025)

corydolphin/flask-cors version 4.0.1 contains a vulnerability where the request path matching is case-insensitive due to the use of the try_match function, which is originally intended for matching hosts. This results in a mismatch because paths in URLs are case-sensitive, but the regex matching treats them as case-insensitive. This misconfiguration can lead to significant security vulnerabilities, allowing unauthorized origins to access paths meant to be restricted, resulting in data exposure and potential data leaks.

References

  • github.com/advisories/GHSA-43qf-4rqw-9q2g
  • github.com/corydolphin/flask-cors
  • github.com/corydolphin/flask-cors/blob/4.0.1/flask_cors/extension.py
  • huntr.com/bounties/808c11af-faee-43a8-824b-b5ab4f62b9e6
  • nvd.nist.gov/vuln/detail/CVE-2024-6866

Code Behaviors & Features

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Affected versions

All versions up to 4.0.1

Solution

Unfortunately, there is no solution available yet.

Impact 5.3 MEDIUM

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Learn more about CVSS

Weakness

  • CWE-178: Improper Handling of Case Sensitivity

Source file

pypi/flask-cors/CVE-2024-6866.yml

Spotted a mistake? Edit the file on GitLab.

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