Description
Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Thunderbird 140.17, Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17.
Published: 2026-09-15
Score: 9.6 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
Source ID Title
Debian DLA Debian DLA DLA-4810-1 thunderbird security update
Debian DSA Debian DSA DSA-6536-1 thunderbird security update
History

Mon, 05 Oct 2026 18:15:00 +0000

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird

Wed, 30 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17. Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Thunderbird 140.17, Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17.
References

Tue, 29 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
Description Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3. Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, Thunderbird 153.3, Firefox ESR 115.42, and Firefox ESR 140.17.
References

Tue, 22 Sep 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 21 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H'}


Thu, 17 Sep 2026 20:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-787

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

Type Values Removed Values Added
Weaknesses CWE-501
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}

threat_severity

Important


Wed, 16 Sep 2026 14:45:00 +0000

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

Wed, 16 Sep 2026 06:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-119
CWE-787

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

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

Tue, 15 Sep 2026 15:00:00 +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 Graphics component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
Title Sandbox escape due to incorrect boundary conditions in the Graphics component
References

Subscriptions

Mozilla Firefox Thunderbird
cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-09-30T17:19:54.875Z

Reserved: 2026-09-15T12:33:55.496Z

Link: CVE-2026-92035

cve-icon Vulnrichment

Updated: 2026-09-21T17:10:05.923Z

cve-icon NVD

Status : Analyzed

Published: 2026-09-15T13:16:54.843

Modified: 2026-10-05T17:59:39.483

Link: CVE-2026-92035

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-15T12:33:56Z

Links: CVE-2026-92035 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-01T20:45:12Z

Weaknesses