GitHub Advisoryadvisory · PyPI

GHSA-43qf-4rqw-9q2g Flask-CORS vulnerable to Improper Handling of Case Sensitivity

MEDIUM Published 2025-03-20 Modified 2025-11-03 Official page ↗
Aliases
CVE-2024-6866
Ecosystem
PyPI
Packages
flask-cors
Severity
Moderate
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N
Weaknesses
CWE-178
Reviewed
2025-03-21

Affected packages

• PyPI flask-cors: < 6.0.0 → fixed in 6.0.0

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.

Related

Alias · CVE (1)

  • CVE-2024-6866 corydolphin/flask-cors version 4.01 contains a vulnerability where the request path matching is case-insensitive due to the use of the… vulnerability

Weakness · CWE (1)

  • CWE-178 Improper Handling of Case Sensitivity weakness

References