CVE-2026-56385
Craft CMS - Authorization Bypass in assets/preview-file Endpoint
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | craftcms |
| Product | cms |
| Published | Jun 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
Affected Versions
craftcms / cms
5.0.0-RC1 < 5.9.14 4.0.0-RC1 < 4.17.8
References
Credits
🔍 GCXWLP