Memory Leak Vulnerability in Node.js HTTP/2 Servers by Node.js
CVE-2026-21714

5.3MEDIUM

Key Information:

Vendor

Nodejs

Status
Node
Vendor
CVE Published:
30 March 2026

What is CVE-2026-21714?

A vulnerability in Node.js HTTP/2 servers leads to a memory leak when clients send WINDOW_UPDATE frames on stream 0, resulting in the flow control window exceeding its maximum limit. Although the server appropriately sends a GOAWAY frame to signal closure, the Http2Session object remains uncleared. This could potentially lead to resource exhaustion and degraded server performance for HTTP/2 users on specified Node.js versions.

Affected Version(s)

node 20.20.1

node 22.22.1

node 24.14.0

References

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

CVSS V3.0

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.