CVE-2025-49007

Name	CVE-2025-49007
Description	Rack is a modular Ruby web server interface. Starting in version 3.1.0 and prior to version 3.1.16, there is a denial of service vulnerability in the Content-Disposition parsing component of Rack. This is very similar to the previous security issue CVE-2022-44571. Carefully crafted input can cause Content-Disposition header parsing in Rack to take an unexpected amount of time, possibly resulting in a denial of service attack vector. This header is used typically used in multipart parsing. Any applications that parse multipart posts using Rack (virtually all Rails applications) are impacted. Version 3.1.16 contains a patch for the vulnerability.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1107363

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
ruby-rack (PTS)	bullseye	2.1.4-3+deb11u2	fixed
	bullseye (security)	2.1.4-3+deb11u3	fixed
	bookworm, bookworm (security)	2.2.13-1~deb12u1	fixed
	sid, trixie	3.1.12-1	vulnerable

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

Package	Type	Release	Fixed Version	Debian Bugs
ruby-rack	source	bullseye	(not affected)
ruby-rack	source	bookworm	(not affected)
ruby-rack	source	(unstable)	(unfixed)	1107363

Notes

[bookworm] - ruby-rack <not-affected> (Introduced in 3.1.0)
[bullseye] - ruby-rack <not-affected> (Introduced in 3.1.0)
https://github.com/rack/rack/security/advisories/GHSA-47m2-26rw-j2jw
https://github.com/rack/rack/commit/4795831a0a310c2d31102749e551b38faab6401f (main)
https://github.com/rack/rack/commit/aed514df37e33907df3c971ed3ca9a0a20ac2901 (v3.1.16)