CVE-2025-47908

Name	CVE-2025-47908
Description	Middleware causes a prohibitive amount of heap allocations when processing malicious preflight requests that include a Access-Control-Request-Headers (ACRH) header whose value contains many commas. This behavior can be abused by attackers to produce undue load on the middleware/server as an attempt to cause a denial of service.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
golang-github-rs-cors (PTS)	bullseye	1.7.0-2	fixed
	forky, sid, bookworm, trixie	1.7.0-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
golang-github-rs-cors	source	(unstable)	(not affected)

Notes

- golang-github-rs-cors <not-affected> (Vulnerable code introduced later)
https://github.com/advisories/GHSA-mh55-gqvf-xfwm
https://github.com/rs/cors/issues/170
https://github.com/rs/cors/pull/171
Fixed by: https://github.com/rs/cors/commit/4c32059b2756926619f6bf70281b91be7b5dddb2 (v1.11.0)