PT-2026-61900 · Mozilla · Firefox+1

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CVE-2026-16388

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Published

2026-07-21

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Updated

2026-08-31

CVSS v3.1

9.8

Critical

VectorAV: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 153 Thunderbird versions prior to 153
Description A sandbox escape exists within the DOM networking component. A sandbox is a security mechanism used to isolate running applications from the rest of the system to prevent malicious code from accessing sensitive data or resources.
Recommendations Update Firefox to version 153. Update Thunderbird to version 153.

Fix

Protection Mechanism Failure

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Weakness Enumeration

Related Identifiers

CVE-2026-16388
OPENSUSE-SU-2026:11358-1
OPENSUSE-SU-2026:11373-1
OPENSUSE-SU-2026:21713-1
SUSE-SU-2026:23411-1

Affected Products

Firefox
Thunderbird