CVE-2026-56385

MediumCVSS 4.3/10Last modified Oct 25, 2026

Description

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.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-639

Affected software

Vendor	Product	Versions
craftcms	cms	>= 5.0.0-RC1, < 5.9.14; >= 4.0.0-RC1, < 4.17.8

References

Timeline

Published: Jun 21, 2026
Last modified: Oct 25, 2026
NVD status: Deferred

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