PT-2026-61887
CVE-2026-16375
·
Published
2026-07-21
·
Updated
2026-09-18
Description by
CVSS 3.1
10
CriticalMetricsAV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 153
Firefox ESR versions prior to 140.13
Thunderbird versions prior to 153
Thunderbird versions prior to 140.13
Description
A site isolation issue exists within the Networking: HTTP component.
Recommendations
Update Firefox to version 153 or later.
Update Firefox ESR to version 140.13 or later.
Update Thunderbird to version 153 or later.
Update Thunderbird to version 140.13 or later.
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