CVE-2025-27209

The V8 release used in Node.js v24.0.0 has changed how string hashes are computed using rapidhash

High · published July 18, 2025

CVSS v3.0
7.5
EPSS
1%
Percentile
69.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
7.5 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.01253 · 69.2th percentile
Published
2025-07-18T22:54Z
EPSS history
Timeline
  • 18 JUL 22:54Z
    The V8 release used in Node.js v24.0.0 has changed how string hashes are computed using rapidhash
    cvelistv5