CVE-2025-27209

Name	CVE-2025-27209
Description	The V8 release used in Node.js v24.0.0 has changed how string hashes are computed using rapidhash. This implementation re-introduces the HashDoS vulnerability as an attacker who can control the strings to be hashed can generate many hash collisions - an attacker can generate collisions even without knowing the hash-seed. * This vulnerability affects Node.js v24.x users.
Source	CVE (at NVD; CERT, 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
nodejs (PTS)	bullseye	12.22.12~dfsg-1~deb11u4	fixed
	bullseye (security)	12.22.12~dfsg-1~deb11u7	fixed
	bookworm, bookworm (security)	18.20.4+dfsg-1~deb12u1	fixed
	forky, trixie	20.19.2+dfsg-1	fixed
	sid	20.19.4+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nodejs	source	(unstable)	(not affected)

Notes

- nodejs <not-affected> (Only affects Node 24)
https://nodejs.org/en/blog/vulnerability/july-2025-security-releases#hashdos-in-v8-cve-2025-27209---high