PT-2026-2640
CVE-2026-0878
·
Published
2026-01-13
·
Updated
2026-06-30
Description by
CVSS 3.1
9.8
CriticalMetricsAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 147
Firefox ESR versions prior to 140.7
Description
A sandbox escape exists due to incorrect boundary conditions within the Graphics: CanvasWebGL component. This issue could potentially allow an attacker to bypass security restrictions.
Recommendations
Update Firefox to version 147 or later.
Update Firefox ESR to version 140.7 or later.
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