Description
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Published: 2026-09-15
Score: 8.8 High
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-119
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': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'}


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

Type Values Removed Values Added
Weaknesses CWE-887

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

Type Values Removed Values Added
Weaknesses CWE-501
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 14:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156. Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
References

Wed, 16 Sep 2026 04:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-887

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

Type Values Removed Values Added
Description Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3. Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, 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 due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
Title Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-09-21T18:04:39.201Z

Reserved: 2026-09-15T12:34:25.394Z

Link: CVE-2026-92064

cve-icon Vulnrichment

Updated: 2026-09-21T18:04:02.783Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-15T13:17:01.020

Modified: 2026-09-21T19:17:16.383

Link: CVE-2026-92064

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-15T12:34:25Z

Links: CVE-2026-92064 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-09-21T21:15:14Z

Weaknesses