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TI-2026-40745 Aliases CVE-2026-56382GHSA-86vw-x4ww-x467

Craft CMS - Remote Code Execution via Missing Config Sanitization in FieldsController

Priority HIGH 72CWE-94Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub. Impact type from CWE-94.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00676 52nd percentileScored 2026-11-07
Fix Fixed cms (craftcms): 5.9.14craftcms/cms (Packagist): 5.9.14

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Craft CMScms5.5.0 to before 5.9.145.9.14Patch availableCNA
—craftcms/cms (Packagist)5.5.0 to before 5.9.145.9.14Patch availableGHSA-86vw-x4ww-x467
  • cms VendorCraft CMS Affected 5.5.0 to before 5.9.14 Fixed in 5.9.14 Patch available CNA
  • craftcms/cms (Packagist) Vendor— Affected 5.5.0 to before 5.9.14 Fixed in 5.9.14 Patch available GHSA-86vw-x4ww-x467

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:*——Craft CMS
  • cpe:2.3:a:craftcms:craft_cms:*:*:*:*:*:*:*:* Versions — — ·Craft CMS

Remediation

  • Fix · CNA cms (craftcms) Fixed in 5.9.14
  • Fix · GHSA-86vw-x4ww-x467 craftcms/cms (Packagist) Fixed in 5.9.14 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56382
  2. 2026-10-03 Alias added: GHSA-86vw-x4ww-x467

References

Advisory 2

Other 1

  • TI-2025-23503 Craft CMS Allows Remote Code Execution KEVCVSS 3.1CRITICAL 10.0
  • TI-2024-37138 RCE when PHP `register_argc_argv` config setting is enabled in craftcms/cms KEVCVSS 4.0CRITICAL 9.3
  • TI-2025-16994 Potential RCE with a compromised security key in craft/cms KEVCVSS 3.1HIGH 8.1
  • TI-2025-24595 Craft CMS stores user-provided content in session files KEVCVSS 4.0MEDIUM 6.9
  • TI-2023-22284 Craft CMS Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
  • TI-2024-25171 Craft CMS up to v3.7.31 was discovered to contain a SQL injection vulnerability via the GraphQL API endpoint. CVSS 3.1CRITICAL 9.8
See all 203 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences