CVE-2025-27209

Updated on 18 Jul 2025

Severity

7.5 High severity

Details

CVSS score
7.5
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Overview

About vulnerability

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.

Details

Affected packages:
nodejs @ 18 (+141 more)

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.

Fixes