VULNERABILITY INTELLIGENCE
CVE-2026-56848
CVSS score7.5 HIGH
EPSS probability0.52%
CISA KEVNot currently listed
Published2026-08-04
Last modified2026-10-24
CVSS vectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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**.
Weakness classification
- support@hackerone.com: CWE-416