CVE-2026-21714_CVE-2026-21714

5.3 / 10

MEDIUM

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

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.

Basic Information

ID CVE-2026-21714

Source hackerone

Published Mar 30, 2026 at 19:07

Modified Mar 31, 2026 at 18:05

Affected Product

Vendor nodejs

Product node

Version 20.20.1

Affected Versions nodejs node 20.20.1
nodejs node 22.22.1
nodejs node 24.14.0
nodejs node 25.8.1

CWE Classification

CWE-401

References

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

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    "published": "2026-03-30T19:07:28.317Z",
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