CVE-2026-33159 json
Craft CMS: Unauthenticated users could execute project configuration sync operations that should be restricted trusted users
published 2026-03-24 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-14938 , GHSA-6mrr-q3pj-h53w
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist craftcms/cms 4.17.8, 5.9.14
- craftcms craft_cms 4.17.8, 5.9.14
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 7 mo ago
Exploit prediction
0.38% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N |
| CNA | 4.0 | 6.9 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/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 |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
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/7f0ead833f7c2b91ae12003caad833479dd08592
web, patch
-
github.com
/craftcms/cms/security/advisories/GHSA-6mrr-q3pj-h53w
web, vendor-advisory
-
github.com
/craftcms/cms/releases/tag/4.17.8
web, release-notes
-
github.com
/craftcms/cms/releases/tag/5.9.14
web, release-notes
-
nvd.nist.gov
/vuln/detail/CVE-2026-33159
advisory
-
github.com
/craftcms/cms
package
Sources
- CVE List CVE-2026-33159
- GitHub Advisory GHSA-6mrr-q3pj-h53w
- NVD CVE-2026-33159
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.