CVE-2024-6866

Name	CVE-2024-6866
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-4197-1
Debian Bugs	1100988

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-flask-cors (PTS)	bullseye	3.0.9-2	vulnerable
	bullseye (security)	3.0.9-2+deb11u1	fixed
	bookworm	3.0.10-2+deb12u1	fixed
	forky, sid, trixie	6.0.1-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
python-flask-cors	source	bullseye	3.0.9-2+deb11u1	DLA-4197-1
python-flask-cors	source	bookworm	3.0.10-2+deb12u1
python-flask-cors	source	(unstable)	6.0.0-1		1100988

Notes

https://huntr.com/bounties/808c11af-faee-43a8-824b-b5ab4f62b9e6
https://github.com/advisories/GHSA-43qf-4rqw-9q2g
Fixed by: https://github.com/corydolphin/flask-cors/commit/eb39516a3c96b90d0ae5f51293972395ec3ef358 (6.0.0)