{"id":"CVE-2026-56382","aliases":["CLSA-2026-1788430341","EUVD-2026-38176","GHSA-86vw-x4ww-x467","GHSA-pmm4-v8f6-4vpp"],"status":"published","title":"Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController","description":"Craft CMS (composer package craftcms/cms) versions \u003e= 5.5.0 and \u003c= 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.","severity":{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00676,"percentile":0.52553,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-94"],"published":"2026-06-21T13:26:58Z","modified":"2026-10-28T02:31:09Z","fixes":[{"ecosystem":"Packagist","package":"craftcms/cms","fixed_in":["5.9.14"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"last_affected":"5.9.13"},{"fixed":"5.9.14"}]}]},{"source":"osv","ecosystem":"TuxCare:Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.15"},{"fixed":"3.9.15-p9+tuxcare"}]}],"versions":["3.9.15","3.9.15-p1+tuxcare","3.9.15-p2+tuxcare","3.9.15-p3+tuxcare","3.9.15-p4+tuxcare","3.9.15-p5+tuxcare","3.9.15-p6+tuxcare","3.9.15-p7+tuxcare","3.9.15-p8+tuxcare"],"bundled":4},{"source":"osv","ecosystem":"Packagist","package":"craftcms/cms","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.9.14"}]}],"versions":["5.5.0","5.5.0.1","5.5.1","5.5.1.1","5.5.10","5.5.2","5.5.3","5.5.4","5.5.5","5.5.6","5.5.6.1","5.5.7","5.5.8","5.5.9","5.6.0","5.6.0.1","5.6.0.2","5.6.1","5.6.10","5.6.10.1","5.6.10.2","5.6.11","5.6.12","5.6.13","5.6.14","5.6.15","5.6.16","5.6.17","5.6.2","5.6.3","5.6.4","5.6.5","5.6.5.1","5.6.6","5.6.7","5.6.8","5.6.9","5.6.9.1","5.7.0","5.7.0-beta.1","5.7.0-beta.2","5.7.1","5.7.1.1","5.7.10","5.7.11","5.7.2","5.7.3","5.7.4","5.7.5","5.7.6","5.7.7","5.7.8","5.7.8.1","5.7.8.2","5.7.9","5.8.0","5.8.1","5.8.10","5.8.11","5.8.12","5.8.13","5.8.13.1","5.8.13.2","5.8.14","5.8.15","5.8.16","5.8.17","5.8.18","5.8.19","5.8.2","5.8.20","5.8.21","5.8.22","5.8.23","5.8.3","5.8.4","5.8.5","5.8.6","5.8.7","5.8.8","5.8.9","5.9.0","5.9.0-beta.1","5.9.0-beta.2","5.9.1","5.9.10","5.9.11","5.9.12","5.9.13","5.9.2","5.9.3","5.9.4","5.9.5","5.9.6","5.9.7","5.9.8","5.9.9"]}],"products":[{"vendor":"craftcms","product":"cms"},{"vendor":"statamic","product":"cms"}],"references":[{"url":"https://github.com/craftcms/cms/security/advisories/GHSA-86vw-x4ww-x467","tags":["vendor-advisory","exploit","advisory","web"]},{"url":"https://www.vulncheck.com/advisories/craft-cms-remote-code-execution-via-missing-config-sanitization-in-fieldscontroller","tags":["third-party-advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56382","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-86vw-x4ww-x467"},{"url":"https://github.com/advisories/GHSA-pmm4-v8f6-4vpp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56382.json","tags":["advisory"]},{"url":"https://github.com/craftcms/cms","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-56382","title":"Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController","description":"Craft CMS (composer package craftcms/cms) versions \u003e= 5.5.0 and \u003c= 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.","status":"published","published":"2026-06-21T13:26:58.994Z","modified":"2026-11-08T14:06:08.481Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high","assessor":"cna"},{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-94"],"updated_at":"2026-11-08T15:43:33.322657Z"}],"euvd":[{"id":"EUVD-2026-38176","description":"Craft CMS (composer package craftcms/cms) versions \u003e= 5.5.0 and \u003c= 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.","status":"published","published":"2026-06-21T13:26:58Z","modified":"2026-11-08T14:06:08Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"updated_at":"2026-11-08T15:13:07.762611Z"}],"ghsa":[{"id":"GHSA-86vw-x4ww-x467","title":"Craft CMS: RCE via missing cleanseConfig in FieldsController::actionRenderCardPreview","description":"The `actionRenderCardPreview()` method in `FieldsController` passes the `fieldLayoutConfig` POST parameter directly to `Fields::createLayout()` without calling `Component::cleanseConfig()`. This allows Yii2 event handler injection via `on eventName` keys in the config array, leading to arbitrary code execution.\n\nThis is the same vulnerability pattern that was fixed in GHSA-4484-8v2f-5748 (same file, `_fldComponent` method correctly uses `cleanseConfig`), GHSA-qx2q-q59v-wf3j (EntryTypesController), and GHSA-2fph-6v5w-89hh (ElementIndexesController).\n\n## PoC\n\nAs an admin user with a valid session:\n\n```\nPOST /admin/actions/fields/render-card-preview HTTP/1.1\nContent-Type: application/x-www-form-urlencoded\nCookie: CraftSessionId=\u003csession\u003e\n\nfieldLayoutConfig[on+init]=phpinfo\u0026CRAFT_CSRF_TOKEN=\u003ctoken\u003e\n```\n\nWhen the FieldLayout object is constructed, Yii2 processes the `on init` key as an event handler registration. During `Component::init()`, the `init` event is triggered, calling `phpinfo()`. The phpinfo output (which includes environment variables, potentially containing database credentials and `CRAFT_SECURITY_KEY`) will appear in the response.\n\n## Impact\n\nAn authenticated admin can achieve RCE through Yii2 event handler injection. While this requires admin access (same as GHSA-4484-8v2f-5748, which was rated moderate), it allows arbitrary PHP function execution and information disclosure via phpinfo.","status":"published","published":"2026-07-09T13:44:12Z","modified":"2026-08-06T21:41:24Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:40:57.999375Z"},{"id":"GHSA-pmm4-v8f6-4vpp","title":"Duplicate Advisory: Craft CMS: RCE via missing cleanseConfig in FieldsController::actionRenderCardPreview","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-86vw-x4ww-x467. This link is maintained to preserve external references.\n\n## Original Description\nCraft CMS (composer package craftcms/cms) versions \u003e= 5.5.0 and \u003c= 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.","status":"withdrawn","published":"2026-06-21T15:31:24Z","modified":"2026-08-06T21:41:16Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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","level":"high"},{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:40:57.999375Z"}],"nvd":[{"id":"CVE-2026-56382","description":"Craft CMS (composer package craftcms/cms) versions \u003e= 5.5.0 and \u003c= 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.","status":"published","published":"2026-06-21T14:16:25.757Z","modified":"2026-10-25T23:10:00.167Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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","level":"high","assessor":"secondary"},{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T14:12:24.912854Z"}],"osv":[{"id":"CVE-2026-56382","title":"Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController","description":"Craft CMS (composer package craftcms/cms) versions \u003e= 5.5.0 and \u003c= 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.","status":"published","published":"2026-06-21T13:26:58.994Z","modified":"2026-11-09T02:30:26.626229962Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-09T03:16:44.651171Z"},{"id":"GHSA-86vw-x4ww-x467","title":"Craft CMS: RCE via missing cleanseConfig in FieldsController::actionRenderCardPreview","description":"The `actionRenderCardPreview()` method in `FieldsController` passes the `fieldLayoutConfig` POST parameter directly to `Fields::createLayout()` without calling `Component::cleanseConfig()`. This allows Yii2 event handler injection via `on eventName` keys in the config array, leading to arbitrary code execution.\n\nThis is the same vulnerability pattern that was fixed in GHSA-4484-8v2f-5748 (same file, `_fldComponent` method correctly uses `cleanseConfig`), GHSA-qx2q-q59v-wf3j (EntryTypesController), and GHSA-2fph-6v5w-89hh (ElementIndexesController).\n\n## PoC\n\nAs an admin user with a valid session:\n\n```\nPOST /admin/actions/fields/render-card-preview HTTP/1.1\nContent-Type: application/x-www-form-urlencoded\nCookie: CraftSessionId=\u003csession\u003e\n\nfieldLayoutConfig[on+init]=phpinfo\u0026CRAFT_CSRF_TOKEN=\u003ctoken\u003e\n```\n\nWhen the FieldLayout object is constructed, Yii2 processes the `on init` key as an event handler registration. During `Component::init()`, the `init` event is triggered, calling `phpinfo()`. The phpinfo output (which includes environment variables, potentially containing database credentials and `CRAFT_SECURITY_KEY`) will appear in the response.\n\n## Impact\n\nAn authenticated admin can achieve RCE through Yii2 event handler injection. While this requires admin access (same as GHSA-4484-8v2f-5748, which was rated moderate), it allows arbitrary PHP function execution and information disclosure via phpinfo.","status":"published","published":"2026-07-09T13:44:12Z","modified":"2026-08-06T21:45:58.113576927Z","cvss":[{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:46:42.077781Z"},{"id":"GHSA-pmm4-v8f6-4vpp","title":"Duplicate Advisory: Craft CMS: RCE via missing cleanseConfig in FieldsController::actionRenderCardPreview","description":"## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-86vw-x4ww-x467. This link is maintained to preserve external references.\n\n## Original Description\nCraft CMS (composer package craftcms/cms) versions \u003e= 5.5.0 and \u003c= 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.","status":"withdrawn","published":"2026-06-21T15:31:24Z","modified":"2026-08-06T21:45:58.119573252Z","cvss":[{"version":"3.1","score":7.2,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","level":"high"},{"version":"4.0","score":8.6,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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","level":"high"}],"cwes":["CWE-94"],"updated_at":"2026-11-02T15:46:53.244788Z"},{"id":"CLSA-2026-1788430341","title":"TuxCare security update for craftcms/cms (4 CVEs)","description":"TuxCare rebuilt craftcms/cms to address 4 CVEs. Fixed in 3.9.15-p9+tuxcare.","status":"published","published":"2026-09-03T10:12:21Z","modified":"2026-10-15T09:48:00.348490408Z","updated_at":"2026-11-02T15:43:47.591214Z"}]}}