Use After Free in Nodejs Node
CVE-2026-56848
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**…
Vulnerability class: Use-After-Free
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Nodejs Node — versions 26.5.0, 24.18.0, 22.23.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-56848?
- CVE-2026-56848 is a high-severity vulnerability in Nodejs Node, classified under Use After Free. CVSS score: 7.5/10. Published 2026-08-04.
- How severe is CVE-2026-56848?
- High severity. CVSS v3 base score is 7.5 out of 10.