CVE-2026-109308

Craft CMS versions 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 are vulnerable to Remote Code Execution (RCE) via behavior injection. The flaw exists because the AppController::actionCacheUpdates function passes the raw updates request parameter to UpdatesModel without calling Component::cleanseC...

CVE-2026-109308 Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 RCE via actionCacheUpdates Behavior Injection

Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 passes the raw 'updates' request parameter in AppController::actionCacheUpdates to UpdatesModel without Component::cleanseConfig, allowing behavior and event-handler injection. Authenticated control panel users with the performUpdates...