CVE-2024-6866: Flask-Cors Project Flask-Cors

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Flask-Cors Project Flask-Cors: version 4.0.1 only

Published 2025-03-20. Last modified 2026-06-17.