Security Advisory

CVE-2026-21714

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-30 19:07:28

Last updated 2026-03-31 18:05:22

Assigner hackerone

State PUBLISHED

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.

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