Improper Handling of Case Sensitivity Affecting python-flask-cors package, versions <3.0.8-2ubuntu0.1+esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.72% (53rd percentile)

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  • Snyk IDSNYK-UBUNTU2004-PYTHONFLASKCORS-9507616
  • 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:20.04 python-flask-cors to version 3.0.8-2ubuntu0.1+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:20.04 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.

CVSS Base Scores

version 3.1