Regex Path Matching Vulnerability in CORS Policy
A vulnerability in version 4.0.1 of the flask-cors plugin allows less restrictive CORS policies to be applied to sensitive endpoints due to improper sorting of regex patterns. This issue was patched in a later version.
Available publicly on Aug 29 2024
Remediation Steps
- Update to the latest version of flask-cors where the issue has been patched.
- Review and test CORS policy configurations to ensure that specific and restrictive patterns are correctly prioritized.
- Consider using explicit path definitions instead of regex patterns for highly sensitive endpoints to avoid ambiguity.
- Monitor application logs for any unauthorized access attempts and adjust CORS policies as necessary.
Patch Details
- Fixed Version: N/A
- Patch Commit: N/A
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