CVE-2026-92068
Site isolation issue in the Reader Mode component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
- Published Sep 15, 2026
- CVSS 5.4 medium
- 0.1% chance of exploitation in the next 30 days (EPSS)
- A fix is available