CVE-2024-4771: Mozilla Firefox

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

A memory allocation check was missing which would lead to a use-after-free if the allocation failed. This could have triggered a crash or potentially be leveraged to achieve code execution. This vulnerability affects Firefox < 126.

Affected products

• Mozilla Firefox: before 126.0 (fixed in 126.0)

Published 2024-05-14. Last modified 2026-06-17.