CVE-2026-106016

Mitigation bypass in the File Handling component

Published Oct 6, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1. Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158.
References
Type Values Removed Values Added
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
Type Values Removed Values Added
Weaknesses CWE-284
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Metrics cvssV3_1

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

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
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Weaknesses CWE-284
CWE-693
Type Values Removed Values Added
Description Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1.
Title Mitigation bypass in the File Handling component
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Oct 13, 2026, 6:08 PM
Reserved
Oct 6, 2026, 12:30 PM
Status
Modified
Published
Oct 6, 2026, 1:16 PM
Modified
Oct 13, 2026, 7:18 PM