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OpenAdvisories
High · 7.5 CVE-2025-27209 EUVD-2025-21940GHSA-qr33-gf7m-pq45

The V8 release used in Node.js v24.0.0 has changed how string hashes are computed using rapidhash. This implementation re-introduces the Ha…

Published Jul 18, 2025 · Updated Nov 4, 2025 · Assigned by hackerone

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.

Affected products

VendorProductAffectedFixed
nodejs node 24.0.0 – < 24.4.1 24.4.1

Advisories 1

References