CVE-2026-92059

Incorrect boundary conditions in the DOM: Editor component

Published Sep 15, 2026 CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Description
Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

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

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

Type Values Removed Values Added
Weaknesses CWE-119
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV3_1

{'score': 9.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}

Type Values Removed Values Added
Weaknesses CWE-129
Type Values Removed Values Added
Description Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156. Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
References
Type Values Removed Values Added
Weaknesses CWE-129
Type Values Removed Values Added
Description Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3. Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
References
Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Description Incorrect boundary conditions in the DOM: Editor component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
Title Incorrect boundary conditions in the DOM: Editor component
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Sep 21, 2026, 5:54 PM
Reserved
Sep 15, 2026, 12:34 PM
Status
Analyzed
Published
Sep 15, 2026, 1:17 PM
Modified
Oct 5, 2026, 6:59 PM
Severity
Moderate
Public date
Sep 15, 2026, 12:34 PM