CVE-2024-6866: Flask-CORS vulnerable to Improper Handling of Case Sensitivity
(updated )
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.
References
- github.com/advisories/GHSA-43qf-4rqw-9q2g
- github.com/corydolphin/flask-cors
- github.com/corydolphin/flask-cors/blob/4.0.1/flask_cors/extension.py
- github.com/corydolphin/flask-cors/commit/eb39516a3c96b90d0ae5f51293972395ec3ef358
- huntr.com/bounties/808c11af-faee-43a8-824b-b5ab4f62b9e6
- lists.debian.org/debian-lts-announce/2025/05/msg00049.html
- nvd.nist.gov/vuln/detail/CVE-2024-6866
Code Behaviors & Features
Detect and mitigate CVE-2024-6866 with GitLab Dependency Scanning
Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →