Security Advisory

CVE-2026-86730

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-09-08 15:14:00

Last updated 2026-09-08 15:36:22

Assigner VulnCheck

CVSS score 8.8

State PUBLISHED

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().

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