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**.
| Version | Type | Source | Base | Exp | Imp |
|---|---|---|---|---|---|
| 3.0 | Primary | cve.org | 7.5 | — | — |
| 3.0 | Secondary | ENISA EUVD | 7.5 | — | — |
| 3.0 | Secondary | NVD | 7.5 | 3.9 | 3.6 |