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CVE-2026-2800

Estado: ModificadaCrítica (9.8)—

Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad crítica de spoofing en WebAuthn (CWE-290) accesible remotamente sin privilegios ni interacción (AV:N, PR:N, UI:N). Permite suplantación de credenciales (T1078) y potencial manipulación de datos de autenticación (T1565).

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementNetwork SegmentationApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser Training

Tecnologías afectadas (2)

Mozilla — FirefoxMozilla — Thunderbird

CWE

Referencias

JSON original (NVD)

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          "options": [
            {
              "exploitation": "none"
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              "technicalImpact": "total"
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          "version": "2.0.3",
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1988145",
      "tags": [
        "Permissions Required"
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  ],
  "lastModified": "2026-06-17T10:31:47.780",
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