Medium severity5.3NVD Advisory· Published Mar 30, 2026· Updated Apr 1, 2026

CVE-2026-21714

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.

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

nodejs.org/en/blog/vulnerability/march-2026-security-releasesnvd

News mentions

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