CVE-2026-2760: firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component

Severity: Critical

CVSS Score: 10

Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.