CVE-2026-56848
HIGH 7.5EPSS 0.5%
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**.
- CVSS v3.0
- 7.5 HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.49% chance of exploitation in the next 30 days, 40th percentile
- Published
- 2026-08-04
Proof-of-concept exploits (1)
- open-flaw/CVE-2026-568480★ · 2026-08-19