CVE-2026-12301 Memory safety bug fixed in Thunderbird 152

Description

Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Affected products and versions

Product	Affected versions	Fixed in
Firefox 152	earliest → < 152	152
Thunderbird 152	earliest → < 152	152

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