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CVE-2026-4715

Estado: ModificadaCrítica (9.1)—

Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

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.

Memoria no inicializada en Canvas2D remoto (AV:N, PR:N, UI:N) permite lectura de datos sensibles (C:H) y denegación de servicio (A:H) sin interacción, explotable en navegador.

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

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Mozilla — Firefox

CWE

Referencias

JSON original (NVD)

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  "metrics": {
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          "options": [
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              "exploitation": "none"
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              "automatable": "yes"
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            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-03-25T19:34:24.461807Z"
        }
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
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  "published": "2026-03-24T13:16:07.410",
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      "url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2018405",
      "tags": [
        "Permissions Required"
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      "source": "security@mozilla.org"
    },
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      "url": "https://www.mozilla.org/security/advisories/mfsa2026-20/",
      "tags": [
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    },
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      "tags": [
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      "source": "security@mozilla.org"
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    {
      "url": "https://www.mozilla.org/security/advisories/mfsa2026-23/",
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      "url": "https://www.mozilla.org/security/advisories/mfsa2026-24/",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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  "descriptions": [
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      "value": "Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9."
    },
    {
      "lang": "es",
      "value": "Memoria no inicializada en el componente Graphics: Canvas2D. Esta vulnerabilidad afecta a Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, y Thunderbird < 140.9."
    }
  ],
  "lastModified": "2026-06-17T10:57:05.953",
  "configurations": [
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}