CVE-2026-56846

high

Description

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**.

References

https://github.com/completetech-security/node-cve-2026-56846-check

https://github.com/CompleTetech-Security/node-cve-2026-56846-check

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

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-52564

Details

Source: Mitre, NVD

Published: 2026-08-04

Updated: 2026-10-23

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H