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Node.js 24.x

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medium advisory

CVE-2026-21717 Node.js V8 Hash Collision Vulnerability

CVE-2026-21717 is a vulnerability in V8's string hashing mechanism within Node.js that allows attackers to cause hash collisions via predictable integer-like strings in JSON input, leading to denial-of-service by degrading the performance of the Node.js process.

Node.js 20.x +3 dos hash-collision node.js
2r 2t 1c