Moderate severityNVD Advisory· Published Mar 24, 2026· Updated Mar 24, 2026
Craft CMS: Unauthenticated users could execute project configuration sync operations that should be restricted trusted users
CVE-2026-33159
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
craftcms/cmsPackagist | >= 5.0.0-RC1, < 5.9.14 | 5.9.14 |
craftcms/cmsPackagist | >= 4.0.0-RC1, < 4.17.8 | 4.17.8 |
Affected products
2Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-6mrr-q3pj-h53wghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-33159ghsaADVISORY
- github.com/craftcms/cms/commit/7f0ead833f7c2b91ae12003caad833479dd08592ghsax_refsource_MISCWEB
- github.com/craftcms/cms/releases/tag/4.17.8ghsax_refsource_MISCWEB
- github.com/craftcms/cms/releases/tag/5.9.14ghsax_refsource_MISCWEB
- github.com/craftcms/cms/security/advisories/GHSA-6mrr-q3pj-h53wghsax_refsource_CONFIRMWEB
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