CVE-2026-56385
5.3
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| craftcms | cms | 5.0.0-RC1 < 5.9.14 | affected |
| craftcms | cms | 5.9.14 | unaffected |
| craftcms | cms | 4.0.0-RC1 < 4.17.8 | affected |
| craftcms | cms | 4.17.8 | unaffected |
Weaknesses
- CWE-639: Authorization Bypass Through User-Controlled Key
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
- https://github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq
- https://github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27
- https://www.vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint
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