PT-2026-27426

CVE-2026-4728

Published

2026-03-24

Updated

2026-08-20

CVSS 2.0

7.8

High

MetricsAV: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.

Exploitability

Fix

Impacts

Researchers

Vendors

Affected products

Weakness enumeration

Related identifiers

CLSA-2026-1787115646

OPENSUSE-SU-2026:10458-1

OPENSUSE-SU-2026:11373-1

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