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MEDIUM: 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LDefault status
unaffected
20.20.1 (semver)
affected
22.22.1 (semver)
affected
24.14.0 (semver)
affected
25.8.1 (semver)
affected
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.
Product status
20.20.1 (semver)
22.22.1 (semver)
24.14.0 (semver)
25.8.1 (semver)
References
nodejs.org/...log/vulnerability/march-2026-security-releases