craftcms/cms · Duplicate Advisory: Craft CMS: Authorized asset "preview file" requests bypass allows users without asset access to retrieve private preview metadata
Affects craftcms/cmsSource GCVE Database
CVSS 4.3 Medium · fixed in 4.17.8 : update craftcms/cms when convenient.
Data as of 7 Aug 2026, 07:16 UTC
- Patch
- Available – fixed in 4.17.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:NWhat to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Packagistcraftcms/cms | Affected
| Fixed in– |
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AI-suggested
Update Craft CMS to version 4.17.8 or later, or 5.9.14 or later to apply the official fix for this authorization bypass vulnerability. No other mitigation steps are indicated by the vendor advisory.
Description
Craft CMS versions 4.0.0-RC1 through 4.17.7 and 5.0.0-RC1 through 5.9.13 contain an authorization bypass vulnerability in the assets/preview-file endpoint. This flaw allows authenticated users with low privileges to retrieve preview metadata for assets they are not authorized to access. The vulnerability was fixed in versions 4.17.8 and 5.9.14. The CVSS score is 4.3, indicating a medium severity impact.
References
- github.com/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-56385 (opens in a new tab)
- github.com/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27 (opens in a new tab)
- vulncheck.com/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint (opens in a new tab)