CVE-2022-45407: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

If an attacker loaded a font using <code>FontFace()</code> on a background worker, a use-after-free could have occurred, leading to a potentially exploitable crash. This vulnerability affects Firefox < 107.

Affected products

• Mozilla Firefox: before 107.0 (fixed in 107.0)

Published 2022-12-22. Last modified 2026-06-17.