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**, and **22.x**.
- Published Aug 4, 2026
- CVSS 7.5 high
- 0.5% chance of exploitation in the next 30 days (EPSS)