CVE-2026-56846CWE-400denial-of-service

CVE-2026-56846

High · published August 4, 2026

CVSS v3.0
7.5
EPSS
1%
Percentile
41.9
In the wild
Unconfirmed
What it is

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**.

The record
Technical detail
CVSS v3.0
7.5 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00500 · 41.9th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-08-04T05:16Z
References (1)
https://nodejs.org/en/blog/vulnerability/july-2026-security-releases · [email protected]
EPSS history
Timeline
  • 04 AUG 00:49Z
    A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memory exhaustion
    cvelistv5