Security Advisory
CVE-2026-56848
7.5
HIGH
Vulnerability 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**.
Published Date
August 4, 2026
Official Source
NIST NVD Advisory