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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.
| Reporter | Title | Published | Views | Family All 137 |
|---|---|---|---|---|
 | CVE-2026-21714 | 30 Mar 202619:07 | – | attackerkb |
 | Amazon Linux 2023 : nodejs22, nodejs22-devel, nodejs22-full-i18n (ALAS2023-2026-1576) | 13 Apr 202600:00 | – | nessus |
| Amazon Linux 2023 : nodejs20, nodejs20-devel, nodejs20-full-i18n (ALAS2023-2026-1577) | 13 Apr 202600:00 | – | nessus |
| Amazon Linux 2023 : nodejs24, nodejs24-devel, nodejs24-full-i18n (ALAS2023-2026-1578) | 13 Apr 202600:00 | – | nessus |
| AlmaLinux 9 : nodejs:24 (ALSA-2026:7350) | 16 Apr 202600:00 | – | nessus |
| AlmaLinux 8 : nodejs:24 (ALSA-2026:7670) | 16 Apr 202600:00 | – | nessus |
| AlmaLinux 10 : nodejs24 (ALSA-2026:7675) | 15 Apr 202600:00 | – | nessus |
| Debian dla-4598 : libnode-dev - security update | 25 May 202600:00 | – | nessus |
| Debian dsa-6183 : libnode-dev - security update | 29 Mar 202600:00 | – | nessus |
| Debian dsa-6272 : libnode-dev - security update | 14 May 202600:00 | – | nessus |
10
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09 Apr 2026 08:39Current
6.7Medium risk
Vulners AI Score6.7
CVSS 35.3
CVSS 3.15.3
EPSS0.00019
SSVC