PT-2026-2653 · Mozilla+3 · Firefox+6
Edgar Chen
·
Published
2026-01-13
·
Updated
2026-03-18
·
CVE-2026-0891
CVSS v3.1
8.1
High
| Vector | AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 147
Thunderbird versions prior to 147
Firefox ESR versions prior to 140.7
Thunderbird ESR versions prior to 140.7
Description
The software contains memory safety bugs that could potentially lead to arbitrary code execution. Some of these bugs exhibited evidence of memory corruption.
Recommendations
Update Firefox to version 147 or later.
Update Thunderbird to version 147 or later.
Update Firefox ESR to version 140.7 or later.
Update Thunderbird ESR to version 140.7 or later.
Fix
DoS
Buffer Overflow
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Weakness Enumeration
Related Identifiers
Affected Products
Firefox
Firefox Esr
Linuxmint
Rocky Linux
Thunderbird
Thunderbird Esr
Ubuntu