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5.7 Medium

CVE-2026-21712 A flaw in Node.js URL processing causes an assertion failure in native code when `url.format()` is called with a…

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.

Affected products and versions

Product Affected versions Fixed in
Node 25.8.1 No fix stated
Node 24.14.0 No fix stated

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