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.

High CVSS 7.5

CVECVE-2026-56846

First seen2026-08-04 02:15 UTC

Disclosed2026-08-04 01:16 UTC

Last updated2026-08-04 02:15 UTC

Channel statusauto

Summary

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**.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Sources

NVD DATABASE

Original Links

https://nodejs.org/en/blog/vulnerability/july-2026-security-releases

Timeline

2026-08-04 nvd_ingest NVD