Craft CMS up to 4.18.1/5.10.5 Condition createCondition condition.config os command injection

Summaryinfo

A vulnerability categorized as problematic has been discovered in Craft CMS up to 4.18.1/5.10.5. The affected element is the function Conditions::createCondition of the component Condition. Such manipulation of the argument condition.config leads to os command injection. This vulnerability is referenced as CVE-2026-72778. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Craft CMS up to 4.18.1/5.10.5 and classified as problematic. Affected by this issue is the function Conditions::createCondition of the component Condition. The manipulation of the argument condition.config with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-72778 since 08/10/2026. The exploitation is known to be easy. The attack may be launched remotely. The exploitation requires an enhanced level of successful authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 4.18.2 or 5.10.6 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Content Management System

Name

• Craft CMS

Version

• 4.18.0
• 4.18.1
• 5.10.0
• 5.10.1
• 5.10.2
• 5.10.3
• 5.10.4
• 5.10.5

License

• free

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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