Improper Handling of Case Sensitivity Affecting python-flask-cors package, versions <4.0.0-1ubuntu0.1~esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.05% (15th percentile)

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  • Snyk IDSNYK-UBUNTU2404-PYTHONFLASKCORS-9507618
  • published26 Jun 2025
  • disclosed20 Mar 2025

Introduced: 20 Mar 2025

CVE-2024-6866  (opens in a new tab)
CWE-178  (opens in a new tab)

How to fix?

Upgrade Ubuntu:24.04 python-flask-cors to version 4.0.0-1ubuntu0.1~esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-flask-cors package and not the python-flask-cors package as distributed by Ubuntu. See How to fix? for Ubuntu:24.04 relevant fixed versions and status.

corydolphin/flask-cors version 4.01 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.