CVE-2026-87908

Name	CVE-2026-87908
Description	multiparty is a Node.js library for parsing multipart/form-data request bodies. In versions from 2.1.0 up to but not including 4.3.1, the parser does not bound the amount of memory used while accumulating the headers of a single multipart part. An unauthenticated attacker can send a single request whose part carries a very large volume of header bytes, forcing the parser to buffer all of them and exhausting the process memory, which crashes the server. This is a denial of service with no confidentiality or integrity impact. The issue is fixed in multiparty 4.3.1, which caps the size of the accumulated part headers. Users should upgrade to multiparty 4.3.1 or later.
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)
Debian Bugs	1147414

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-multiparty (PTS)	bookworm	4.2.3-2	vulnerable
	trixie	4.2.3-3	vulnerable
	forky, sid	4.3.1+~4.2.1-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
node-multiparty	source	(unstable)	4.3.1+~4.2.1-1			1147414

Notes

[trixie] - node-multiparty <no-dsa> (Minor issue)
[bookworm] - node-multiparty <postponed> (Minor issue)
https://github.com/pillarjs/multiparty/security/advisories/GHSA-5h46-2939-q3wh