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CVE-2026-21712

Published: Mar 30, 2026Updated: May 10, 2026 Sources: CVE List NVD BDUCWE-20
NVD MITRE
5.7CVSSMEDIUM
EPSS Score
0.3%
Top 75.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

A flaw in Node.js URL processing causes an assertion failure in native code when `url.format()` is called with a malformed internationalized domain name (IDN) containing invalid characters, crashing the Node.js process.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:RS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-20

Affected Products

nodenodejsOSS Libraries
Node.jsNode.js FoundationOSS Libraries
nodejsoss-projectUSOSS Librariesaka node.js, node
node.js foundationoss-projectUSOSS Librariesaka nodejs foundation, node foundation

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://hackerone.com/reports/3546390
hackerone.com
https://nodejs.org/en/blog/vulnerability/march-2026-security-releases
nodejs.org
https://github.com/nodejs/node/commit/d88a46aa280c72a00dbee6171abf9469c3694e13
github.com
and 1 more references View all →

Timeline

Published
Mar 30, 2026
Last Updated
May 10, 2026

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