RCE in Craftcms Cms
CVE-2026-56382
Craft CMS (composer package craftcms/cms) versions >= 5.5.0 and <= 5.9.13 contain a remote code execution vulnerability in the FieldsController::actionRenderCardPreview() method, which passes the fieldLayoutConfig POST parameter directly to Fields::createLayout() without calling Component::cleanseConfig(). An authenticated admin user can inject Yii2 event handlers (e.g., 'on init' keys) via the fieldLayoutConfig parameter to execute arbitrary PHP code and disclose sensitive information (such as environment variables containing database credentials and CRAFT_SECURITY_KEY). The issue is fixed in version 5.9.14.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (57.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Craftcms Cms — versions 5.5.0, 5.9.14
Weakness classification (CWE)
References
- github.com/craftcms/cms/security/advisories/GHSA-86vw-x4ww-x467 (vendor-advisory)
- www.vulncheck.com/advisories/craft-cms-remote-code-execution-via-missing-config… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56382?
- CVE-2026-56382 is a high-severity vulnerability in Craftcms Cms, classified under Code Injection. CVSS score: 7.2/10. Published 2026-06-21.
- How severe is CVE-2026-56382?
- High severity. CVSS v3 base score is 7.2 out of 10.