CVE-2026-16387

Updated on 21 Jul 2026

Severity

9.8 Critical severity

Details

CVSS score
9.8
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Overview

About vulnerability

Site isolation issue in the Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Details

Affected product:
AlmaLinux 9.2 ESU
Affected packages:
thunderbird @ 115.4.1 (+1 more)

Fixes