CVE-2017-5379: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 1.8% chance of exploitation in the next 30 days.

Use-after-free vulnerability in Web Animations when interacting with cycle collection found through fuzzing. This vulnerability affects Firefox < 51.

Affected products

• Mozilla Firefox: before 51.0 (fixed in 51.0)

Published 2018-06-11. Last modified 2026-06-17.