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.
References (2)
Core 2
Core References
Exploit, Third Party Advisory
https://huntr.com/bounties/808c11af-faee-43a8-824b-b5ab4f62b9e6
Scores
CVSS v3
7.5
EPSS
0.0060
EPSS Percentile
43.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-178
Status
published
Products (2)
flask-cors_project/flask-cors
4.0.1
pypi/flask-cors
0 - 6.0.0PyPI
Published
Mar 20, 2025
Tracked Since
Feb 18, 2026