GHSA-XJ2C-G5XP-4P47 Duplicate Advisory: Craft CMS: Authenticated "assets/preview-thumb" discloses signed fallback transform preview link to CP users without asset-view permission

Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-x76w-8c62-48mg. This link is maintained to preserve external references. Original Description Craft CMS contains a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user...

CVE-2026-56384

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...

CVE-2026-56384

Craft CMS has a missing authorization vulnerability in the assets/preview-thumb endpoint. A Control Panel user without permission to view a private asset can call the endpoint with an attacker-controlled assetId and receive preview HTML containing a signed fallback transform preview link for that...

PT-2026-51232

Name of the Vulnerable Software and Affected Versions Craft CMS versions 4.0.0-RC1 through 4.17.7 Craft CMS versions 5.0.0-RC1 through 5.9.13 Description A missing authorization issue exists in the 'assets/preview-thumb' endpoint. A Control Panel user lacking permissions to view a specific privat...