CVE-2026-117971: firefox: thunderbird: Sandbox escape due to use-after-free in the Print Preview component

Severity: Critical

CVSS Score: 9.6

Sandbox escape due to use-after-free in the Print Preview component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.