Node.js · Report #3131758

HashDoS in V8

Validstatus

highseverity

53upvotes

15 Jul 2025disclosed

Summary

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.

How it was found

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