CVE-2026-12289
Mozilla Firefox, Thunderbird, Red Hat Enterprise Linux 10
Privilege escalation in the Graphics: WebRender component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
- CVSS
- 8.8
- EPSS
- 0.40% 32.3% percentile
- CISA KEV
- Not listed
- Published
- 2026.06.16