PT-2026-27426 · Mozilla · Thunderbird+1

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CVE-2026-4728

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Published

2026-03-24

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Updated

2026-07-25

CVSS v2.0

7.8

High

VectorAV:N/AC:L/Au:N/C:N/I:C/A:N
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 149 Thunderbird versions prior to 149
Description A spoofing issue exists in the Privacy: Anti-Tracking component.
Recommendations Update Firefox to version 149 or later. Update Thunderbird to version 149 or later.

Fix

Authentication Bypass by Spoofing

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Weakness Enumeration

Related Identifiers

BDU:2026-12142
CVE-2026-4728
OPENSUSE-SU-2026:10458-1
OPENSUSE-SU-2026:11373-1

Affected Products

Firefox
Thunderbird