Vulnerability DatabaseCVE-2026-56846
Mend.io Vulnerability Database
The largest open source vulnerability database
What is a Vulnerability ID?
New vulnerability? Tell us about it!
CVE-2026-56846
Published:August 04, 2026
Updated:August 04, 2026
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.
Affected Packages
https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v22.0.0 <v22.23.2
Fix Suggestion:
Update to version v22.23.2
https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v24.0.0 <v24.18.1
Fix Suggestion:
Update to version v24.18.1
Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (1)
https://nodejs.org/en/blog/vulnerability/july-2026-security-releases
Do you need more information?
Contact Us
CVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Uncontrolled Resource Consumption
CWE-400
EPSS
Base Score:
0.55