CVE-2024-3853: Mozilla Firefox

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

A use-after-free could result if a JavaScript realm was in the process of being initialized when a garbage collection started. This vulnerability affects Firefox < 125.

Affected products

• Mozilla Firefox: before 125.0 (fixed in 125.0)

Published 2024-04-16. Last modified 2026-06-17.