CVE-2026-72778

Craft CMS versions from 4.0.0-RC1 before 4.18.2 and from 5.0.0-RC1 before 5.10.6 contain an authenticated remote code execution vulnerability in the control panel element-search condition handling. Craft cleanses the outer request-controlled condition array via Component::cleanseConfig(), but Conditions::createCondition() later decodes and merges the JSON string in condition.config without re-running cleanseConfig() on the decoded configuration. Because condition.config is a JSON string during the first cleanse, Yii special config keys such as 'as ...' and 'on ...' can be hidden inside it and, after JSON decoding, are interpreted by Yii as behavior/event configuration during FieldLayout object creation. An attacker with an authenticated control panel session (and a valid CSRF token) can exploit this to execute operating system commands as the PHP/web user.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/craftcms/cms/security/advisories/GHSA-265m-7826-wjqm
https://www.vulncheck.com/advisories/craft-cms-rc1-before-authenticated-rce-via-condition-config

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-11 13:19

Updated : 2026-08-26 16:57

NVD link : CVE-2026-72778

Mitre link : CVE-2026-72778

CVE.ORG link : CVE-2026-72778

JSON object : View

Products Affected

No product.

CWE

CWE-915

Improperly Controlled Modification of Dynamically-Determined Object Attributes

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