---
cve: "CVE-2026-21712"
severity: "MEDIUM"
cvss: 5.7
epss: "32%"
vendor: "nodejs"
kev: false
exploited: false
published: "2026-03-30 15:13:59"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T03:58:59+02:00"
---

# CVE-2026-21712

> 5.7 MEDIUM

## Beschreibung

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-Vektor

```
CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Erforderlich | good |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-21712) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_