CVE-2026-109746 Mitigation bypass in the DOM: Security component

Description

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 158	earliest → < 158	158
Thunderbird 158	earliest → < 158	158

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-2026-118024 Use-after-free in the Graphics: Text component 8.8 High CVE-2026-118026 Invalid pointer in the JavaScript: GC component 8.8 High