CVE-2026-56384
Medium · 4.3CVSS
4.3
EPSS
0.3%
Published
Jun 21, 2026
CISA due date
—
The record
Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user without permission to view a target private asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview link for that private asset, because no asset-view permission check is performed before preview generation. This affects versions >= 4.0.0-RC1, <= 4.17.7 and >= 5.0.0-RC1, <= 5.9.13, and is fixed in 4.17.8 and 5.9.14.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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