CVE-2026-21714 | Mend Vulnerability Database

Vulnerability DatabaseCVE-2026-21714

CVE-2026-21714

March 23, 2026

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.

Affected Packages

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v20.0.0 <v20.20.2

Fix Suggestion:

Update to version v20.20.2

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v22.0.0 <v22.22.2

Fix Suggestion:

Update to version v22.22.2

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v22.0.0 <v22.22.2

Fix Suggestion:

Update to version v22.22.2

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v24.0.0 <v24.14.1

Fix Suggestion:

Update to version v24.14.1

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v25.0.0 <v25.8.2

Fix Suggestion:

Update to version v25.8.2

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v24.0.0 <v24.14.1

Fix Suggestion:

Update to version v24.14.1

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v20.0.0 <v20.20.2

Fix Suggestion:

Update to version v20.20.2

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v22.0.0 <v22.22.2

Fix Suggestion:

Update to version v22.22.2

https://github.com/nodejs/node.git (GITHUB):

Affected version(s) >=v20.0.0 <v20.20.2

Fix Suggestion:

Update to version v20.20.2

Related Resources (1)

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

Do you need more information?

CVSS v3

Base Score:

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH