VulnerabilityAnalyzed

CVE-2026-33159

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,…

MEDIUM 6.9EPSS 0.31%

Does this matter?

Lower severity and a low EPSS score (0.31%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 6.9 MEDIUMCVSS: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/M
EPSS: 0.31% probability · 24th percentile
CISA KEV: Not listed
Weakness: CWE-306, CWE-862
Affected: craftcms/craft cms
Source: security-advisories@github.com

References

https://github.com/craftcms/cms/commit/7f0ead833f7c2b91ae12003caad833479dd08592Patch
https://github.com/craftcms/cms/releases/tag/4.17.8Release Notes
https://github.com/craftcms/cms/releases/tag/5.9.14Release Notes
https://github.com/craftcms/cms/security/advisories/GHSA-6mrr-q3pj-h53wVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.