{"id":"CVE-2026-109308","title":"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","summary":"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. Aut…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-94"],"vendor":"craftcms","product":"cms","affected":["cms >= 4.0.0 < 4.18.7","cms >= 5.0.0 < 5.10.14"],"published":"2026-10-12","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:15:07.947","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109308","references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-5m2g-hhqr-84pc","label":"disclosure@vulncheck.com"},{"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","label":"disclosure@vulncheck.com"}],"tags":["nvd","cve.org"],"epss":0.0049,"epssPercentile":0.41942,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-13T15:46:56.285080Z"},"ingestedAt":"2026-10-12T18:00:08.196Z","slug":"CVE-2026-109308","body":"## Overview\n\nCraft 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}