CVE-2026-3846: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Same-origin policy bypass in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 148.0.2.

Affected products

• Mozilla Firefox: before 148.0.2 (fixed in 148.0.2)

Published 2026-03-10. Last modified 2026-06-17.