CVE-2025-13021: Mozilla Firefox

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Incorrect boundary conditions in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 145 and Thunderbird 145.

Affected products

• Mozilla Firefox: before 145.0 (fixed in 145.0)

Published 2025-11-11. Last modified 2026-06-17.