CVE-2026-33159
Medium
Description
Craft CMS is a content management system (CMS). From version 4.0.0-RC1 to before version 4.17.8 and from version 5.0.0-RC1 to before version 5.9.14, guest users can access Config Sync updater index, obtain signed data, and execute state-changing Config Sync actions (regenerate-yaml, apply-yaml-changes) without authentication. This issue has been patched in versions 4.17.8 and 5.9.14.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Craftcms Craft Cms
PublishedMar 24, 2026
First seenMar 24, 2026
How to fix
Update
- craftcms craft_cms4.17.8, 5.9.14 or later
- craftcms/cms5.9.14, 4.17.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| craftcms craft_cms | 4.0.0 < v < 4.17.8, 5.0.0 < v < 5.9.14, 4.0.0, 5.0.0 | 4.17.8, 5.9.14 |
| craftcms/cmsPackagist | 5.0.0-RC1 ≤ v < 5.9.14, 4.0.0-RC1 ≤ v < 4.17.8 | 5.9.14, 4.17.8 |
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