Yii2 Behavior Injection in Craft CMS by Pixel & Tonic
CVE-2026-32263
8.6HIGH
What is CVE-2026-32263?
In Craft CMS versions 5.6.0 to before 5.9.11, a security vulnerability exists due to the direct passing of the $settings array to Craft::configure() without cleansing the input. This flaw allows a malicious user with control panel administrator permissions to inject Yii2 behavior and event handlers, exploiting keys prefixed with 'as' or 'on'. The vulnerability is particularly impactful when 'allowAdminChanges' is enabled. Users are advised to upgrade to version 5.9.11 or later, where this issue has been addressed.
Affected Version(s)
cms >= 5.6.0, < 5.9.11