Craft CMS 5.0.0-RC1 before 5.10.6 Authenticated RCE via condition.config
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.
CVE-2026-72778
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-72778
cms
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
cms
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "craftcms",
"product": "cms",
"versions": [
{
"status": "affected",
"version": "5.0.0-RC1",
"lessThan": "5.10.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.6",
"versionType": "semver"
}
],
"packageURL": "pkg:composer/craftcms/cms",
"defaultStatus": "unaffected"
},
{
"vendor": "craftcms",
"product": "cms",
"versions": [
{
"status": "affected",
"version": "4.0.0-RC1",
"lessThan": "4.18.2",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.2",
"versionType": "semver"
}
],
"packageURL": "pkg:composer/craftcms/cms",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-72778
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12825 · Revision 1
- Added to Heist Feed
- Publisher date