CVE-2026-56846: A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memor…
A flaw in Node.js HTTP/2 handling can cause HTTP/2 retained header blocks evade maxSessionMemory and enable remote memory exhaustion. This vulnerability affects Node.js **24.x** and **22.x**.
- Published by source
- 2026-08-04
- First seen by Reality Radar
- 2026-10-24
- Last verified
- 2026-10-24
What the official notice says
Risk: CVSS 7.5
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Sources
- NIST National Vulnerability Database Tier A · official published 2026-08-04
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #1513 | new | 2026-10-24 | e46546993ef8…3b2d0f | b461e3e01240…ca07af |
Chain head: #1565 7d9afd922511…68b9c7