CVE-2026-21714

MEDIUM CVSS 5.3 View on NVD ↗

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

https://nodejs.org/en/blog/vulnerability/march-2026-security-releases

Published: Mar 30, 2026 20:16 UTC Modified: Mar 30, 2026 20:16 UTC