CVE-2026-21714
Published: Mar 30, 2026
Modified: Mar 31, 2026
CVSS v3.0
5.3
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.
| Vendor | Product | Versions |
|---|---|---|
nodejs | node | affected 20.20.1 - <= 20.20.1affected 22.22.1 - <= 22.22.1affected 24.14.0 - <= 24.14.0affected 25.8.1 - <= 25.8.1 |
CVSS v3.0 Details
CVSS v3.0 Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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