PT-2026-61906 · Mozilla · Firefox+1

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CVE-2026-16394

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Published

2026-07-21

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Updated

2026-08-31

CVSS v3.1

9.1

Critical

VectorAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Name of the Vulnerable Software and Affected Versions Firefox versions prior to 153 Thunderbird versions prior to 153
Description A mitigation bypass exists within the DOM Security component. The Document Object Model (DOM) is a programming interface for web documents that represents the page so that programs can change the document structure, style, and content.
Recommendations Update Firefox to version 153. Update Thunderbird to version 153.

Fix

Protection Mechanism Failure

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Weakness Enumeration

Related Identifiers

CVE-2026-16394
OPENSUSE-SU-2026:11358-1
OPENSUSE-SU-2026:11373-1
OPENSUSE-SU-2026:21713-1
SUSE-SU-2026:23411-1

Affected Products

Firefox
Thunderbird