CVE-2026-112770: cms 4.0.0 to before 4.18.8, 5.0.0 to before 5.11.0

Affected technology

cms · 4.0.0 to before 4.18.8
craftcms

cms · 5.0.0 to before 5.11.0
craftcms

Description’s affected range: before 4.18.8 and 5.x before 5.11.0

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · Low privileges required · No user interaction required

What an attacker can do

Authenticated control panel users can pass an array-callable such as FileHelper::writeToFile via element-select condition rules to write a webshell to the webroot and execute code as the web user. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality, integrity and availability impact as high.