CVE-2026-56385

Craft CMS versions = 5.0.0-RC1, = 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...

CVE-2026-56385 Craft CMS - Authorization Bypass in assets/preview-file Endpoint

Craft CMS versions = 5.0.0-RC1, = 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...

CVE-2026-56385

Craft CMS suffers an authorization bypass in the assets/preview-file endpoint. Versions affected: 5.0.0-RC1–5.9.13 and 4.0.0-RC1–4.17.7. An authenticated low-privileged user can supply an assetId for an asset they should not view and still receive preview data (previewHtml), including a private p...

EUVD-2026-38179

Craft CMS versions = 5.0.0-RC1, = 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...

CVE-2026-56385

Craft CMS versions = 5.0.0-RC1, = 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...

PT-2026-51233

Name of the Vulnerable Software and Affected Versions Craft CMS versions 5.0.0-RC1 through 5.9.13 Craft CMS versions 4.0.0-RC1 through 4.17.7 Description An authorization bypass exists in the 'assets/preview-file' endpoint. The system fails to enforce per-asset view authorization before returning...

Missing Authorization

Overview craftcms/cms is a content management system. Affected versions of this package are vulnerable to Missing Authorization in the assets/preview-file. An attacker can access unauthorized preview metadata by sending crafted requests with a controlled assetId parameter, allowing retrieval of...