CVE-2026-56385 json
Craft CMS - Authorization Bypass in assets/preview-file Endpoint
published 2026-03-26 7 mo ago modified 2026-11-08 22 h ago also EUVD-2026-38179 , GHSA-44px-qjjc-xrhq
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist craftcms/cms 4.17.8, 5.9.14
- craftcms cms 4.17.8, 5.9.14
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 4 mo ago
Exploit prediction
0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | craftcms/cms | >=5.0.0-RC1, <5.9.14 >=4.0.0-RC1, <4.17.8 |
5.9.14 4.17.8 |
Affected products
- craftcms cms
Classification
References
-
github.com
/craftcms/cms/commit/d30df3112220db1ffd6726a3ed11857014c7fb27
patch, web
-
github.com
/craftcms/cms/commit/b1cddf72c98a66801beb04ea4b07e72182b7b7db
web
-
github.com
/craftcms/cms/security/advisories/GHSA-44px-qjjc-xrhq
vendor-advisory, web
-
vulncheck.com
/advisories/craft-cms-authorization-bypass-in-assets-preview-file-endpoint
third-party-advisory, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-56385
advisory
-
github.com
/craftcms/cms
package
Sources
- CVE List CVE-2026-56385
- GitHub Advisory GHSA-44px-qjjc-xrhq
- NVD CVE-2026-56385
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