CVE-2026-21712

MediumCVSS 6.5/10Last modified Aug 19, 2026

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.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
nodejs	node	>= 24.14.0, <= 24.14.0; >= 25.8.1, <= 25.8.1

References

https://hackerone.com/reports/3546390Issue Tracking, Third Party Advisory
https://nodejs.org/en/blog/vulnerability/march-2026-security-releasesVendor Advisory

Timeline

Published: Mar 30, 2026
Last modified: Aug 19, 2026
NVD status: Analyzed

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