CVE-2026-109308

8.8 HIGHpublic exploit available

Published 2026-10-12 · Updated 2026-10-16

AI risk analysis

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.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to Craft CMS 4.18.7 or 5.10.14 to remediate this vulnerability.

rcecmswebcraft

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-94

Public exploit & PoC references

https://github.com/craftcms/cms/security/advisories/GHSA-5m2g-hhqr-84pc

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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