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
nodejs: node.js
References2
- nodejs.org/en/blog/vulnerability/march-2026-security-releases Vendor Advisory
- hackerone.com/reports/3546390 Issue TrackingThird Party Advisory
Metrics
- CVSS 3.1
-
6.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 27 · as of 12 November 2026
- CWE
- CWE-20
Could this be exploited in your environment?
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