ACTIVELY EXPLOITED3 sources verified·1 min read
By Lyrie Threat Intelligence·11/3/2021
CVE-2019-17026 added to CISA KEV: Mozilla Firefox and Thunderbird
Status: ✅ Confirmed exploited in the wild
Date added: 2021-11-03
Required action: Apply updates per vendor instructions.
Due date: 2022-05-03
Why this matters
Mozilla Firefox and Thunderbird contain a type confusion vulnerability due to incorrect alias information in the IonMonkey JIT compiler when setting array elements.
Sources
Lyrie Verdict
Lyrie's autonomous detection layer catches active exploitation primitives at machine speed — closing the gap between disclosure and weaponization that traditional defense simply can't cover.