CVE-2026-21712

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

References

• https://hackerone.com/reports/3546390
• https://nodejs.org/en/blog/vulnerability/march-2026-security-releases