GHSA-43qf-4rqw-9q2gMediumCVSS 5.3

Flask-CORS vulnerable to Improper Handling of Case Sensitivity

Published
March 20, 2025
Last Modified
November 3, 2025

🔗 CVE IDs covered (1)

📋 Description

corydolphin/flask-cors version 5.0.1 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.

🎯 Affected products1

  • pip/flask-cors:<= 5.0.1

🔗 References (6)