CVE-2026-21714

5.3 mediumEPSS 0.4%

Medium (5.3) in nodejs node.js. EPSS 0.4% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.0

5.3 medium

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 37% of CVEs (scores of 2026-10-31)
CWE: CWE-401
Published: 2026-03-30
Modified: 2026-08-19
Record from: the NVD, synced 2026-10-19

Affected

nodejs:node.js

References

https://nodejs.org/en/blog/vulnerability/march-2026-security-releases

Check your stack JSON