{"id":"CVE-2026-109308","published":"2026-10-12T17:17:25.227","lastModified":"2026-10-16T19:15:07.947","description":"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 permission or Updates-utility access can supply 'as' or 'on' keys, such as an AttributeTypecastBehavior gadget, to execute arbitrary code.","cvssScore":8.8,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-94"],"vendors":[],"products":[],"references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-5m2g-hhqr-84pc","tags":[]},{"url":"https://www.vulncheck.com/advisories/craft-cms-4.0.0-before-4.18.7-and-5.0.0-before-5.10.14-rce-via-actioncacheupdates-behavior-injection","tags":[]}],"exploitRefs":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-5m2g-hhqr-84pc","tags":[]}],"hasPoc":true,"ai":{"summary":"Craft CMS allows authenticated users to inject arbitrary code through the UpdatesModel by passing raw request parameters without proper cleansing, potentially leading to remote code execution.","exploitability":"Exploitation requires an authenticated user with performUpdates permission or Updates-utility access, and is moderately difficult as it requires crafting specific payload structures with AttributeTypecastBehavior gadgets.","blast_radius":"If exploited, this vulnerability could allow attackers to execute arbitrary code on the Craft CMS server, potentially leading to full system compromise and data breaches.","remediation":"Upgrade to Craft CMS 4.18.7 or 5.10.14 to remediate this vulnerability.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","cms","web","craft"],"model":"garnet-coder","analyzedAt":"2026-10-16T08:54:38.955Z"}}