CVE Tools
Sign in

CVE-2026-21714

Published: Mar 30, 2026Updated: Apr 1, 2026 Sources: CVE List NVD BDUCWE-401
NVD MITRE
5.3CVSSMEDIUM
EPSS Score
0.5%
Top 64.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

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.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-401

Affected Products

nodenodejsOSS Libraries
Debian GNU/LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
Node.jsNode.js FoundationOSS Libraries
nodejsoss-projectUSOSS Librariesaka node.js, node
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
node.js foundationoss-projectUSOSS Librariesaka nodejs foundation, node foundation

Exploitability

Official Patch Available

References

https://nodejs.org/en/blog/vulnerability/march-2026-security-releases
nodejs.org
https://nodejs.org/en/blog/release/v25.8.2/
nodejs.org
https://nodejs.org/en/blog/release/v24.14.1/
nodejs.org
and 4 more references View all →

Timeline

Published
Mar 30, 2026
Last Updated
Apr 1, 2026

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2026-21714 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows