Craft CMS: Potential authenticated Remote Code Execution via malicious attached Behavior
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
Craft CMS is a content management system (CMS). From 4.0.0 to before 4.17.12 and 5.9.18, Craft CMS which contains an input-handling flaw in a Yii object creation path that let any authenticated user inject malicious configuration and execute arbitrary commands on the server. The request-controlled condition field layouts data is converted into a live FieldLayout object without a Component::cleanseConfig() boundary. Because Craft configures models before parent::__construct(), attacker-controlled special config keys can take effect during object creation, and FieldLayout initialization then triggers a same-request event. This vulnerability is fixed in 4.17.12 and 5.9.18.
Why it matters now
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
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Craft CMS | cms | 4.0.0 to before 4.17.12; 5.0.0 to before 5.9.18 | 4.17.12, 5.9.18 | Patch available | CNA |
| — | craftcms/cms (Packagist) | 4.0.0 to before 4.17.12 | 4.17.12 | Patch available | GHSA-qrgm-p9w5-rrfw |
| — | craftcms/cms (Packagist) | 5.0.0 to before 5.9.18 | 5.9.18 | Patch available | GHSA-qrgm-p9w5-rrfw |
- cms VendorCraft CMS Affected 4.0.0 to before 4.17.12; 5.0.0 to before 5.9.18 Fixed in 4.17.12, 5.9.18 Patch available CNA
- craftcms/cms (Packagist) Vendor— Affected 4.0.0 to before 4.17.12 Fixed in 4.17.12 Patch available GHSA-qrgm-p9w5-rrfw
- craftcms/cms (Packagist) Vendor— Affected 5.0.0 to before 5.9.18 Fixed in 5.9.18 Patch available GHSA-qrgm-p9w5-rrfw
Remediation
- Fix · CNA cms (craftcms) Fixed in 4.17.12, 5.9.18
- Fix · GHSA-qrgm-p9w5-rrfw craftcms/cms (Packagist) Fixed in 4.17.12 Advisory →
- Fix · GHSA-qrgm-p9w5-rrfw craftcms/cms (Packagist) Fixed in 5.9.18 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44011
- 2026-10-03 Alias added: GHSA-qrgm-p9w5-rrfw
References
More Craft CMS vulnerabilities
- 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
Sources
- CVE-2026-44011 · CVE Program
- CVE-2026-44011 · NVD
- FIRST EPSS
- GHSA-qrgm-p9w5-rrfw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences