0.591 Medium
EPSS
Percentile
97.8%
Incorrect handling of proto mutations may lead to type confusion in IonMonkey JIT code and can be leveraged for arbitrary memory read and write. This vulnerability affects Firefox < 66.0.1, Firefox ESR < 60.6.1, and Thunderbird < 60.6.1.
0.591 Medium
EPSS
Percentile
97.8%