PT-2026-84196 · Mozilla · Thunderbird+1
CVE-2026-84143
·
Published
2026-09-01
·
Updated
2026-09-05
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Firefox version 154
Firefox ESR version 153.1
Firefox ESR version 140.14
Thunderbird version 154
Thunderbird ESR version 153.1
Thunderbird ESR version 140.14
Description
Internal bugs were identified that exhibit evidence of memory corruption or other security-relevant defects, which could potentially be exploited.
Recommendations
Update Firefox version 154 to version 155.
Update Firefox ESR version 153.1 to version 153.2.
Update Firefox ESR version 140.14 to version 140.15.
Update Thunderbird version 154 to version 155.
Update Thunderbird ESR version 153.1 to version 153.2.
Update Thunderbird ESR version 140.14 to version 140.15.
Fix
Information Disclosure
Buffer Overflow
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Related Identifiers
Affected Products
Firefox
Thunderbird