CVE-2026-117888

Uninitialized memory in the Graphics: Canvas2D component

Published Oct 27, 2026 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed
Description
Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4866-1 firefox-esr security update
Debian DLA Debian DLA DLA-4877-1 thunderbird security update
History
Type Values Removed Values Added
Weaknesses CWE-200
Type Values Removed Values Added
Weaknesses CWE-457
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'}

ssvc

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

Type Values Removed Values Added
First Time appeared Mozilla
Mozilla firefox
Vendors & Products Mozilla
Mozilla firefox
Type Values Removed Values Added
Weaknesses CWE-200
Type Values Removed Values Added
Description Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6. Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 159, Firefox ESR 153.6, Thunderbird 159, and Thunderbird 153.6.
References
Type Values Removed Values Added
Description Uninitialized memory in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.
Title Uninitialized memory in the Graphics: Canvas2D component
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mozilla
Published
Updated
Nov 4, 2026, 6:01 PM
Reserved
Oct 27, 2026, 2:05 PM
Status
Deferred
Published
Oct 27, 2026, 2:16 PM
Modified
Nov 4, 2026, 7:17 PM