CVE-2026-21714
Published:March 30, 2026
Updated:April 23, 2026
A memory leak occurs in Node.js HTTP/2 servers when a client sends WINDOW_UPDATE frames on stream 0 (connection-level) that cause the flow control window to exceed the maximum value of 2³¹-1. The server correctly sends a GOAWAY frame, but the Http2Session object is never cleaned up. This vulnerability affects HTTP2 users on Node.js 20, 22, 24 and 25.
Affected Packages
https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v20.0.0 <v20.20.2Fix Suggestion:
Update to version v20.20.2https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v25.0.0 <v25.8.2Fix Suggestion:
Update to version v25.8.2https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v24.0.0 <v24.14.1Fix Suggestion:
Update to version v24.14.1https://github.com/nodejs/node.git (GITHUB):
Affected version(s) >=v22.0.0 <v22.22.2Fix Suggestion:
Update to version v22.22.2Related Resources (1)
Do you need more information?
Contact UsCVSS 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)
Missing Release of Memory after Effective Lifetime
EPSS
Base Score:
0.01
