CVE-2026-21714
5.3
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| nodejs | node | 20.20.1 <= 20.20.1 | affected |
| nodejs | node | 22.22.1 <= 22.22.1 | affected |
| nodejs | node | 24.14.0 <= 24.14.0 | affected |
| nodejs | node | 25.8.1 <= 25.8.1 | affected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
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