Security Advisory

CVE-2026-56848

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-08-04 15:57:24

Last updated 2026-08-04 17:36:14

Assigner hackerone

CVSS score not scored

State PUBLISHED

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**.

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