CVE-2026-56846

highpriority · track · 10EPSS 0.005 · 43 %ileexploit · PoCDEEUFRUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · PoC

Likely / severe?

0.50% (43rd) EPSS

CVSS 7.5 · high

Is it mine?

15 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · osv · cert_bund

EPSS · scored 2026-10-26

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**.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · support@hackerone.comexploitability 3.9 · impact 3.6

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-400US

exploits (1)

Public proof-of-concept and weaponised exploit code.

CompleTetech-Security/node-cve-2026-56846-checkOffline Node.js evidence checker for CVE-2026-56846: HTTP/2 retained header memory exhaustion. Single-file Python; JSON/CSV/HTML reports; no exploit payloads.PoC · poc_in_github

affected products (15)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Oracle Linuxall versionscert_bundDEcpe:/o:oracle:linux:-
RESF Rocky Linuxall versionscert_bundDEcpe:/o:resf:rocky_linux:-
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
SUSE openSUSEall versionscert_bundDEcpe:/o:suse:opensuse:-
Open Source Node.js< 22.23.2cert_bundDE
Open Source Node.js< 24.18.1cert_bundDE
Open Source Node.js< 26.5.1cert_bundDE
nodejs Node≤ 24.18.0 ≤24.18.0enisa_euvdEU
nodejs Node≤ 22.23.1 ≤22.23.1enisa_euvdEU
Bitnami node< 22.23.2osvUSpkg:bitnami/node
Bitnami node23.0.0 → 24.18.1osvUSpkg:bitnami/node
Bitnami node-min< 22.23.2osvUSpkg:bitnami/node-min
Bitnami node-min23.0.0 → 24.18.1osvUSpkg:bitnami/node-min

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2585Node.js: Mehrere SchwachstellenDeutsch2026-07-29csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Node.js ausnutzen, um einen Denial of Service Angriff durchzuführen, um Sicherheitsvorkehrungen zu umgehen, und um Dateien zu manipulieren.
BIT-node-2026-568462026-08-17vendor · osvUS
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**.
BIT-node-min-2026-568462026-08-17vendor · osvUS
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**.
CERTFR-2026-AVI-1385Multiples vulnérabilités dans les produits VMwareFrançais2026-10-26vendor · certfrFR

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv cert_bund certfr NVD CVE.org MITRE

published 2026-08-04modified 2026-10-23

references (3)

External citations — patches, advisories, analysis.

scry

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