What is GHSA-679w-638g-xf9h?

GHSA-679w-638g-xf9h is a security advisory published by GitHub Security Advisories with High severity. A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly...

Which CVE IDs does GHSA-679w-638g-xf9h cover?

GHSA-679w-638g-xf9h covers the following CVE IDs: CVE-2026-56848. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-679w-638g-xf9h?

GHSA-679w-638g-xf9h has a CVSS v3 base score of 7.5, published by GitHub Security Advisories.

GHSA-679w-638g-xf9hHighCVSS 7.5

A flaw in Node.js HTTP/2 handling allows `nghttp2_session_mem_send()` to be called re-entrantly...

Vendor

GitHub Security Advisories

Published

August 4, 2026

Last Modified

August 4, 2026

🔗 CVE IDs covered (1)

CVE-2026-56848 →

📋 Description

A flaw in Node.js HTTP/2 handling allows nghttp2_session_mem_send() to be called re-entrantly while nghttp2_session_mem_recv() is executing, resulting in a heap-use-after-free.

This vulnerability affects Node.js 26.x, 24.x, and 22.x.

🔗 References (3)

https://nvd.nist.gov/vuln/detail/CVE-2026-56848
https://nodejs.org/en/blog/vulnerability/july-2026-security-releases
https://github.com/advisories/GHSA-679w-638g-xf9h