PT-2026-111471
CVE-2026-109750
·
Published
2026-10-13
·
Updated
2026-10-20
Description by
CVSS 3.1
9.6
CriticalMetricsAV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 158
Thunderbird versions prior to 158
Description
A site isolation issue exists within the DOM Web Authentication component. Site isolation is a security mechanism that ensures web pages from different sites are processed in separate processes to prevent data leakage.
Recommendations
Update Firefox to version 158 or later.
Update Thunderbird to version 158 or later.
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