CVE-2026-84141
Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
- Published Sep 1, 2026
- CVSS 9.8 critical
- 0.6% chance of exploitation in the next 30 days (EPSS)
- A fix is available