Detections
Analytics
CVE-2026-21714
high
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. Thank you, to galbarnahum for reporting this vulnerability and thank you RafaelGSS for fixing it.