CVE-2026-12300

MEDIUM

Mozilla Firefox - Memory Safety Bug Fixed in Thunderbird 152

Title source: rule
STIX 2.1

Description

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

References (3)

Core 3

Scores

CVSS v3 5.3
EPSS 0.0025
EPSS Percentile 16.5%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-119
Status published
Products (4)
mozilla/firefox < 152.0.0
Mozilla/Firefox 152
mozilla/thunderbird < 152.0.0
Mozilla/Thunderbird 152
Published Jun 16, 2026
Tracked Since Jun 16, 2026