CVE-2026-21714
MEDIUM
NVD
CVSS Score
5.3
Severity
MEDIUM
Published
Mar 30, 2026
Vendor
unknown
Description
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.