CVE-2026-44659

{
  "id": "CVE-2026-44659",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-11T18:16:38.380",
  "lastModified": "2026-10-26T18:10:00.173",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Zen is a firefox-based browser. Prior to 1.19.12b, the ZEN Browser incorrectly truncates long hostnames in the address bar and shows only the attacker-controlled prefix of the subdomain, hiding the actual registrable domain (eTLD+1). As a result, an attacker can craft extremely long malicious subdomains that visually imitate trusted brands, and the browser will display only the spoofed prefix, misleading users about the actual origin of the site. This directly compromises the URL bar as a security indicator and creates a phishing/supply-chain attack vector. This vulnerability is fixed in 1.19.12b."
    },
    {
      "lang": "es",
      "value": "Zen es un navegador basado en Firefox. Anteriormente a 1.19.12b, el navegador ZEN trunca incorrectamente los nombres de host largos en la barra de direcciones y muestra solo el prefijo del subdominio controlado por el atacante, ocultando el dominio registrable real (eTLD+1). Como resultado, un atacante puede crear subdominios maliciosos extremadamente largos que imitan visualmente marcas de confianza, y el navegador mostrará solo el prefijo falsificado, engañando a los usuarios sobre el origen real del sitio. Esto compromete directamente la barra de URL como indicador de seguridad y crea un vector de ataque de phishing/cadena de suministro. Esta vulnerabilidad está corregida en 1.19.12b."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "zen-browser",
          "product": "desktop",
          "versions": [
            {
              "version": "< 1.19.12b",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N",
          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-12T16:13:40.754441Z",
          "id": "CVE-2026-44659",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-451"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/zen-browser/desktop/security/advisories/GHSA-7p2r-fp29-9w69",
      "source": "[email protected]"
    }
  ]
}