CVE-2026-56846: 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**
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-56846
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-56846 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- medium[NEW] [medium] Node.js: Multiple vulnerabilitiescert-bund
- unknownNode.js Multiple Vulnerabilitieshkcert
- unknownMultiple Vulnerabilities in Node.js (July 30, 2026)cert-fr-avis
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