CVE-2025-27209

Published: Jul 18, 2025Modified: Jun 17, 2026Deferred

7.5

Vector

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

Exploitability: 3.9 / Impact: 3.6

Source: support@hackerone.com (Secondary)

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.

Related CWEs

CWE-407

Inefficient Algorithmic Complexity

An algorithm in a product has an inefficient worst-case computational complexity that may be detrimental to system performance and can be triggered by an attacker, typically using crafted manipulations that ensure that the worst case is being reached.

References (2)

https://nodejs.org/en/blog/vulnerability/july-2025-security-releases

Source: support@hackerone.com

http://www.openwall.com/lists/oss-security/2025/07/22/2

Source: af854a3a-2127-422b-91ae-364da2661108

Timeline

No history available yet.