CVSS 10.0CVSS 10.0 · CRITICAL
CVE-2026-4689
Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
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Puntaje: 10.0(CRITICAL)
Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HAV: NETWORK
AC: LOW
PR: NONE
UI: NONE
S: CHANGED
C: HIGH
I: HIGH
A: HIGH
Tipo de falla (CWE):
CWE-190CWE-754CWE-120EPSS
Probabilidad de explotación (próx. 30 días): 0.0066 (0.7%)
Percentil: 47.5%
EPSS: 2026-07-14
Afecta
mozilla:firefoxmozilla:thunderbirdDescripción técnica
Sandbox escape due to incorrect boundary conditions, integer overflow in the XPCOM component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Publicada: 24/3/2026, 13:16:04
Última modificación: 15/7/2026, 2:22:46
Referencias
- https://bugzilla.mozilla.org/show_bug.cgi?id=2016374
- https://www.mozilla.org/security/advisories/mfsa2026-20/
- https://www.mozilla.org/security/advisories/mfsa2026-21/
- https://www.mozilla.org/security/advisories/mfsa2026-22/
- https://www.mozilla.org/security/advisories/mfsa2026-23/
- https://www.mozilla.org/security/advisories/mfsa2026-24/
- https://access.redhat.com/errata/RHSA-2026:5930
- https://access.redhat.com/errata/RHSA-2026:5931