CVE-2026-6749
Estado: ModificadaAlta (7.5)—
Information disclosure due to uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- Puntuación base: 7.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.60%
- Percentil entre todas las CVEs puntuadas: 47
- Fecha de la puntuación: 5/10/2026
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.
- Explotación
T1190Exploit Public-Facing Applicationinitial access45 % - Impacto principal
T1005Data from Local Systemcollection75 %
AV:N/PR:N/UI:N indica acceso remoto sin privilegios ni interacción (T1190). La divulgación de memoria no inicializada en Canvas2D permite leer datos sensibles (T1005), no ejecución de comandos.
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
Tecnologías afectadas (2)
CWE
- CWE-908
- CWE-824
Referencias
- https://bugzilla.mozilla.org/show_bug.cgi?id=2022610
- https://www.mozilla.org/security/advisories/mfsa2026-30/
- https://www.mozilla.org/security/advisories/mfsa2026-31/
- https://www.mozilla.org/security/advisories/mfsa2026-32/
- https://www.mozilla.org/security/advisories/mfsa2026-33/
- https://www.mozilla.org/security/advisories/mfsa2026-34/
- https://access.redhat.com/errata/RHSA-2026:10757
- https://access.redhat.com/errata/RHSA-2026:10766
- https://access.redhat.com/errata/RHSA-2026:10767
- https://access.redhat.com/errata/RHSA-2026:12285
- https://access.redhat.com/errata/RHSA-2026:13537
- https://access.redhat.com/errata/RHSA-2026:15892
- https://access.redhat.com/errata/RHSA-2026:17477
- https://access.redhat.com/errata/RHSA-2026:17687
- https://access.redhat.com/errata/RHSA-2026:17688
- https://access.redhat.com/errata/RHSA-2026:17689
- https://access.redhat.com/errata/RHSA-2026:17690
- https://access.redhat.com/errata/RHSA-2026:19041
- https://access.redhat.com/errata/RHSA-2026:19131
- https://access.redhat.com/errata/RHSA-2026:19201
- https://access.redhat.com/errata/RHSA-2026:19348
- https://access.redhat.com/errata/RHSA-2026:19461
- https://access.redhat.com/errata/RHSA-2026:19462
- https://access.redhat.com/errata/RHSA-2026:19463
- https://access.redhat.com/errata/RHSA-2026:19464
- https://access.redhat.com/errata/RHSA-2026:19465
- https://access.redhat.com/errata/RHSA-2026:19466
- https://access.redhat.com/errata/RHSA-2026:19467
- https://access.redhat.com/errata/RHSA-2026:19468
- https://access.redhat.com/errata/RHSA-2026:19469
- https://access.redhat.com/errata/RHSA-2026:19542
- https://access.redhat.com/errata/RHSA-2026:19655
- https://access.redhat.com/errata/RHSA-2026:19704
- https://access.redhat.com/security/cve/CVE-2026-6749
- https://bugzilla.redhat.com/show_bug.cgi?id=2460096
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6749.json
JSON original (NVD)
Mostrar
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