CVE-2026-4722 Privilege escalation in the IPC component

Description

Privilege escalation in the IPC component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 149	earliest → < 149	149
Thunderbird 149	earliest → < 149	149

Other CVEs of Firefox

The 2221 CVEs of Firefox →

CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118025 Other issue in the SVG component 8.8 High CVE-2026-118026 Invalid pointer in the JavaScript: GC component 8.8 High