CVE-2026-86730
HIGH
NVD
CVSS Score
8.8
Severity
HIGH
Published
Sep 08, 2026
Vendor
unknown
Description
Craft CMS versions before 5.10.12 fail to properly cleanse string-typed field-layout elements, allowing authenticated control-panel users to inject Yii2 behavior attachments and event handlers. Attackers can post field-layout tab elements as JSON strings to bypass cleanse validation, then trigger arbitrary object instantiation and code execution through Craft::createObject().