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Vulnerability DatabaseCVE-2026-21714

CVE-2026-21714: 
Node.js vulnerability analysis and mitigation

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.

Source: NVD

Related Node.js vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-21717MEDIUM5.9
  • Node.jsNode.js
  • nodejs
NoYesMar 30, 2026
CVE-2026-21713MEDIUM5.9
  • Node.jsNode.js
  • nodejs
NoYesMar 30, 2026
CVE-2026-21714MEDIUM5.3
  • Node.jsNode.js
  • nodejs
NoYesMar 30, 2026
CVE-2026-21716LOW3.3
  • Node.jsNode.js
  • nodejs
NoYesMar 30, 2026
CVE-2026-21715LOW3.3
  • Node.jsNode.js
  • nodejs
NoYesMar 30, 2026

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