CVE-2026-72778

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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."}, {"lang": "es", "value": "Versiones de Craft CMS desde la 4.0.0-RC1 anterior a la 4.18.2 y desde la 5.0.0-RC1 anterior a la 5.10.6 contienen una vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo autenticada en el manejo de condiciones de b\u00fasqueda de elementos del panel de control. Craft limpia el array de condiciones externo controlado por la solicitud a trav\u00e9s de Component::cleanseConfig(), pero Conditions::createCondition() decodifica y fusiona posteriormente la cadena JSON en condition.config sin volver a ejecutar cleanseConfig() en la configuraci\u00f3n decodificada. Debido a que condition.config es una cadena JSON durante la primera limpieza, las claves de configuraci\u00f3n especiales de Yii como \u2019as ...\u2019 y \u2019on ...\u2019 pueden ocultarse dentro de ella y, despu\u00e9s de la decodificaci\u00f3n JSON, son interpretadas por Yii como configuraci\u00f3n de comportamiento/evento durante la creaci\u00f3n del objeto FieldLayout. Un atacante con una sesi\u00f3n autenticada del panel de control (y un token CSRF v\u00e1lido) puede explotar esto para ejecutar comandos del sistema operativo como el usuario PHP/web."}], "id": "CVE-2026-72778", "lastModified": "2026-10-24T15:10:00.190", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-72778", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-08-14T19:52:54.520965Z", "version": "2.0.3"}}]}, "published": "2026-08-11T13:19:08.207", "references": [{"source": "disclosure@vulncheck.com", "url": "https://github.com/craftcms/cms/security/advisories/GHSA-265m-7826-wjqm"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/craft-cms-rc1-before-authenticated-rce-via-condition-config"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-915"}], "source": "disclosure@vulncheck.com", "type": "Secondary"}]}

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