CVE-2026-8945: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Sandbox escape in Firefox and Firefox Focus for Android. This vulnerability was fixed in Firefox 151.

Affected products

• Mozilla Firefox: before 151.0.0 (fixed in 151.0.0)
• Mozilla Firefox Focus: before 151.0 (fixed in 151.0)

Published 2026-05-19. Last modified 2026-07-15.