FKIE_CVE-2026-21712

Vulnerability from fkie_nvd - Published: 2026-03-30 16:16 - Updated: 2026-04-01 14:24
Severity ?
5.7 (Medium) - CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
Summary
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.
References
support@hackerone.comhttps://hackerone.com/reports/3546390
support@hackerone.comhttps://nodejs.org/en/blog/vulnerability/march-2026-security-releases
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "Una falla en el procesamiento de URL de Node.js causa una falla de aserci\u00f3n en c\u00f3digo nativo cuando se llama a \u0027url.format()\u0027 con un nombre de dominio internacionalizado (IDN) malformado que contiene caracteres no v\u00e1lidos, colapsando el proceso de Node.js."
    }
  ],
  "id": "CVE-2026-21712",
  "lastModified": "2026-04-01T14:24:21.833",
  "metrics": {
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 2.1,
        "impactScore": 3.6,
        "source": "support@hackerone.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-30T16:16:03.510",
  "references": [
    {
      "source": "support@hackerone.com",
      "url": "https://hackerone.com/reports/3546390"
    },
    {
      "source": "support@hackerone.com",
      "url": "https://nodejs.org/en/blog/vulnerability/march-2026-security-releases"
    }
  ],
  "sourceIdentifier": "support@hackerone.com",
  "vulnStatus": "Awaiting Analysis"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.