7.5

CVE-2026-56846: nodejs node Uncontrolled Resource Consumption

Awaiting analysis
AliasesALPINE-CVE-2026-56846UBUNTU-CVE-2026-56846DEBIAN-CVE-2026-56846
Published 04-08-2026Last modified 04-08-2026

Vulnerability summary

CVE-2026-56846 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in nodejs node. EPSS estimates a 0.50% chance of exploitation in the next 30 days, higher than 42.8% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.0 (CVE.org)
EPSS score
0.50%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 27 · Related 16
MGASA-2026-0359OPENSUSE-SU-2026:11439-1OPENSUSE-SU-2026:11440-1OPENSUSE-SU-2026:21545-1OPENSUSE-SU-2026:21546-1RHSA-2026:48305

Timeline

  1. 04-08-2026
    PublishedVulnerability first disclosed.
  2. 04-08-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.50%

Chance of exploitation in the next 30 days

Percentile

43%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.50% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Chainguard2 products
  • eco-nodejs-20.9.0All versions (No fix recorded)
  • nodejs-20All versions (No fix recorded)
Alpine1 product
  • nodejs< 22.23.2-r0 | < 24.18.1-r0
Debian1 product
  • nodejs< 18.20.4+dfsg-1~deb12u3 | < 20.19.2+dfsg-1+deb13u3 | < 24.19.0+dfsg+~cs24.13.3-1
Nodejs1 product
  • node24.18.0 | 22.23.1
Ubuntu1 product
  • nodejsAll versions (No fix recorded)
Wolfi1 product
  • nodejs-20All versions (No fix recorded)

6 vendors · 7 products

References

6 links