CVE-2026-92035

CriticalCVSS 9.6/10Last modified Oct 5, 2026

Description

Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Thunderbird 140.17, Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17.

Metrics

CVSS 3.1 9.6/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-119

Affected software

VendorProductVersions
MozillaFirefox—
MozillaThunderbird—

References

Timeline

Published
Sep 15, 2026
Last modified
Oct 5, 2026
NVD status
Analyzed

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CVE-2026-92035: Critical severity, CVSS 9.6 | Vulnix