CVE-2026-56846

Aliases:ALPINE-CVE-2026-56846UBUNTU-CVE-2026-56846DEBIAN-CVE-2026-56846CGA-844v-m8hv-v8vwCGA-p4mg-qq7m-wv6w
Advisory lineage Upstream: 0 Downstream: 26
Awaiting Analysis
Published: 04 Aug 2026, 00:49
Last modified:04 Aug 2026, 15:03

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.0 (cve.org)
EPSS Score
0.5% LOW
1% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

04 Aug 2026, 00:49
Published
Vulnerability first disclosed
04 Aug 2026, 15:03
Last Modified
Vulnerability 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

  • v3.0•HIGH•Score: 7.5CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.50%• Percentile: 42%

Techniques & Countermeasures

  • CWE-400•Uncontrolled Resource Consumption

    The product does not properly control the allocation and maintenance of a limited resource.

Affected Systems

  • alpine•nodejs

    < 22.23.2-r0 | < 22.23.2-r0 | < 24.18.1-r0 | < 24.18.1-r0

  • chainguard•nodejs-20

    all

  • wolfi•nodejs-20

    all

  • debian•nodejs

    all | all | all | all | < 24.19.0+dfsg+~cs24.13.3-1

  • ubuntu•nodejs

    all | all | all

  • nodejs•node

    24.18.0 | 22.23.1

References (6)