Vulnerability Description
Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization before returning preview content, allowing an authenticated low-privileged user to supply a controlled assetId for an asset they are not permitted to view and still receive preview response data (previewHtml), including a private preview image route containing the target private assetId. Fixed in 5.9.14 and 4.17.8.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27
- https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq
- https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-pr
FAQ
What is CVE-2026-56385?
CVE-2026-56385 is a vulnerability with a CVSS score of 4.3 (MEDIUM). Craft CMS versions >= 5.0.0-RC1, <= 5.9.13 and >= 4.0.0-RC1, <= 4.17.7 contain an authorization bypass in the assets/preview-file endpoint. The action does not enforce per-asset view authorization bef...
How severe is CVE-2026-56385?
CVE-2026-56385 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56385?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.