Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 RCE via actionCacheUpdates Behavior Injection
Craft CMS 4.0.0 before 4.18.7 and 5.0.0 before 5.10.14 passes the raw 'updates' request parameter in AppController::actionCacheUpdates to UpdatesModel without Component::cleanseConfig(), allowing behavior and event-handler injection. Authenticated control panel users with the performUpdates permission or Updates-utility access can supply 'as' or 'on' keys, such as an AttributeTypecastBehavior gadget, to execute arbitrary code.
CVE-2026-109308
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-2026-109308
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": "4.0.0",
"lessThan": "4.18.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.18.7",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
},
{
"vendor": "craftcms",
"product": "cms",
"versions": [
{
"status": "affected",
"version": "5.0.0",
"lessThan": "5.10.14",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.14",
"versionType": "semver"
}
],
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-109308
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #20324 · Revision 1
- Added to Heist Feed
- Publisher date