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CVE CVE-2026-21714

CVE-2026-21714

Node.js

Severity: MEDIUM
CVSS: 5.3CVSS
Published: 2026-03-30
Last modified: 2026-04-01
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CWE: CWE-401

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.

References

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

Summary

Description

References