CVE-2026-56848: high-severity vulnerability in nodejs node
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
41Vexday Risk Score
No sign of exploitation. It has a public proof of concept.
ssvc Attendcvss 7.5epss 0.5%
from disclosure to weapon15 days
Published on NVDAug 4
1st PoC+15d
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:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
nodejs · nodepublic PoCs found — 5
githubgithub.com/open-flaw/CVE-2026-56848★ 0githubgithub.com/CompleteTech-LLC/node-cve-2026-56848-check★ 0githubgithub.com/CompleteTech-Security/node-cve-2026-56848-check★ 0githubgithub.com/CompleTetech-Security/node-cve-2026-56848-check★ 0githubgithub.com/CompleTech-Security/node-cve-2026-56848-check★ 0⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — nodejs node
In the same product, most dangerous first.