medium6.5
CVE-2026-33159
Craft CMS: Unauthenticated Users Can Perform Restricted Project Config Sync Operations
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| composer | craftcms/cms | >= 5.0.0-RC1, <= 5.9.13 | 5.9.14 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Craftcms | Craft Cms | after 4.0.0 before 4.17.8 after 5.0.0 before 5.9.14 Versions 4.0.0, 5.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6mrr-q3pj-h53w
- https://github.com/craftcms/cms/security/advisories/GHSA-6mrr-q3pj-h53w
- https://github.com/craftcms/cms/commit/7f0ead833f7c2b91ae12003caad833479dd08592
- https://github.com/craftcms/cms/releases/tag/4.17.8
- https://github.com/craftcms/cms/releases/tag/5.9.14
- https://nvd.nist.gov/vuln/detail/CVE-2026-33159