What’s Vulnerable › Vulnerabilities

CVE-2024-6866: Case-Insensitive Path Matching in corydolphin/flask-cors

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-03-20 · updated 2026-06-17
• Weakness: CWE-178

Description

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

• corydolphin/flask-cors: 4.0.1

References

• https://huntr.com/bounties/808c11af-faee-43a8-824b-b5ab4f62b9e6
• https://lists.debian.org/debian-lts-announce/2025/05/msg00049.html

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