Description
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
Published: 2026-09-15
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Mon, 21 Sep 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-693
Metrics cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N'}

ssvc

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

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'}


Thu, 17 Sep 2026 19:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-269
CWE-668

Thu, 17 Sep 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-653
References
Metrics threat_severity

None

cvssV3_1

{'score': 3.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N'}

threat_severity

Low


Wed, 16 Sep 2026 05:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-269
CWE-668

Tue, 15 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
Description Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156. Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
References

Tue, 15 Sep 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox

Tue, 15 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156.
Title Sandbox escape in the Profile Backup component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-09-21T18:11:58.229Z

Reserved: 2026-09-15T12:34:27.431Z

Link: CVE-2026-92066

cve-icon Vulnrichment

Updated: 2026-09-21T18:09:35.461Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-15T13:17:01.283

Modified: 2026-09-21T19:17:16.780

Link: CVE-2026-92066

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-15T12:34:27Z

Links: CVE-2026-92066 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T21:00:07Z

Weaknesses