CVE-2026-21714
Medium · 5.3CVSS
5.3
EPSS
0.5%
Published
Mar 30, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Leap 16.0 | nodejs22 | 0 | 22.23.0-160000.1.1 |
| openSUSE:Leap 16.0 | nodejs24 | 0 | 24.14.1-160000.1.1 |
| openSUSE:Tumbleweed | nodejs24 | 0 | 24.14.1-1.1 |
| openSUSE:Tumbleweed | nodejs26 | 0 | 26.3.1-1.1 |
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