CVE-2026-56846: Node.js Node

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memory exhaustion. This vulnerability affects Node.js **24.x** and **22.x**.

Affected products

• Node.js Node: from 24, up to and including 24.18.0; from 22, up to and including 22.23.1

Published 2026-08-04. Last modified 2026-09-03.