CVE-2026-84141

Integer overflow in the Graphics: ImageLib component

Published Sep 1, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.

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
Weaknesses CWE-680
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Mozilla thunderbird
Weaknesses CWE-190
CPEs cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Vendors & Products Mozilla thunderbird
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'}

Type Values Removed Values Added
Weaknesses CWE-680
Type Values Removed Values Added
Weaknesses CWE-680
Type Values Removed Values Added
Description Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2. Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
References
Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Weaknesses CWE-680
Type Values Removed Values Added
Description Integer overflow in the Graphics: ImageLib component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.
Title Integer overflow in the Graphics: ImageLib component
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Sep 3, 2026, 5:23 PM
Reserved
Sep 1, 2026, 7:25 AM
Status
Modified
Published
Sep 1, 2026, 1:20 PM
Modified
Sep 3, 2026, 6:17 PM