by Kastro CVE-2026-12296
Mozilla Firefox — Sandbox escape in the Security: Process Sandboxing component
Description · from the CVE record
Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Affected
ProductAffectedFixed inSource
Firefoxsee advisory140.12CNA
Thunderbirdsee advisory140.12CNA
Red Hat Enterprise Linux 10see advisory0:140.12.0-1.el10_2redhat-SADP
Red Hat Enterprise Linux 10see advisory0:140.12.0-1.el10_2redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Supportsee advisory0:140.12.0-1.el10_0redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Supportsee advisory0:140.12.0-1.el10_0redhat-SADP
Red Hat Enterprise Linux 7 Extended Lifecycle Supportsee advisory0:140.12.0-1.el7_9redhat-SADP
Red Hat Enterprise Linux 8see advisory0:140.12.0-1.el8_10redhat-SADP
Red Hat Enterprise Linux 8see advisory0:140.12.0-1.el8_10redhat-SADP
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportsee advisory0:140.12.0-1.el8_4redhat-SADP
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportsee advisory0:140.12.0-1.el8_4redhat-SADP
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-Onsee advisory0:140.12.0-1.el8_4redhat-SADP
Scores by source
CISA ADP9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
redhat-SADP (CNA)7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total