PT-2026-84190 · Mozilla · Firefox+2
CVE-2026-84137
·
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 versions prior to 155
Firefox ESR versions prior to 153.2
Thunderbird versions prior to 155
Thunderbird versions prior to 153.2
Description
A spoofing issue exists within the DOM: Core & HTML component.
Recommendations
Update Firefox to version 155.
Update Firefox ESR to version 153.2.
Update Thunderbird to version 155.
Update Thunderbird to version 153.2.
Fix
UI Misrepresentation of Critical Information
Origin Validation Error
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Related Identifiers
Affected Products
Firefox
Firefox Esr
Thunderbird