CVE-2026-109308 Craft CMS - Remote Code Execution

Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 contains a remote code execution caused by passing raw 'updates' parameter without cleansing in AppController::actionCacheUpdates, letting authenticated control panel users with performUpdates permission or Updates-utility access execute arbitrary code via behavior and event-handler injection.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.49% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Remote Code Execution
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
12 October 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Upgrade to versions 4.18.7, 5.10.14 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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