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.
Scores
CVSS v3
5.3
EPSS
0.0002
EPSS Percentile
4.5%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-401
Status
published
Products (4)
nodejs/node
20.20.1
nodejs/node
22.22.1
nodejs/node
24.14.0
nodejs/node
25.8.1
Published
Mar 30, 2026
Tracked Since
Mar 31, 2026