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.

CVSS 4.0

8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS

0.9% chance of exploitation in the next 30 days; higher than 59% of CVEs (scores of 2026-10-25)

CWE

CWE-94

Published

2026-06-21

Modified

2026-10-25

Record from

the NVD, synced 2026-10-25

References

• https://github.com/craftcms/cms/security/advisories/GHSA-86vw-x4ww-x467
• https://www.vulncheck.com/advisories/craft-cms-remote-code-execution-via-missing-config-sanitization-in-fieldscontroller
• https://github.com/craftcms/cms/security/advisories/GHSA-86vw-x4ww-x467

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