CVE-2026-21714
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
2th
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 | nodejs |
| Product | node |
| Ecosystems | |
| Industries | Technology |
| Published | Mar 30, 2026 |
| Last Updated | Mar 31, 2026 |
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CVSS v3 Breakdown
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Affected Versions
nodejs / node
20.20.1 ≤ 20.20.1 22.22.1 ≤ 22.22.1 24.14.0 ≤ 24.14.0 25.8.1 ≤ 25.8.1