CVE-2025-27209

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
hackeroneCNA
7.5 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Debian logo
Debian Releases
Debian Product
Codename
nodejs
bullseye
12.22.12~dfsg-1~deb11u4
fixed
bullseye (security)
12.22.12~dfsg-1~deb11u7
fixed
bookworm
18.19.0+dfsg-6~deb12u2
fixed
bookworm (security)
18.19.0+dfsg-6~deb12u1
fixed
sid
20.19.2+dfsg-1
fixed
trixie
20.19.2+dfsg-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
nodejs
plucky
not-affected
noble
not-affected
jammy
not-affected
focal
not-affected
bionic
not-affected
xenial
not-affected
trusty
not-affected
Vulnerability Media Exposure
References
https://nodejs.org/en/blog/vulnerability/july-2025-security-releases