Auth bypass in Craftcms Cms
CVE-2026-109306
Craft CMS from 5.0.0 before 5.10.14 contains a missing authorization vulnerability in AppController::actionSwitchToLicensedEdition() that lets any authenticated user change the installed edition. Low-privileged front-end users can call the action route when the licensed edition mismatches to persistently downgrade the site edition in project config, which admins cannot reverse from the control panel.
Vulnerability class: Broken Access Control
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/craftcms/cms/security/advisories/GHSA-4wfw-q5w3-jh42 (vendor-advisory)
- www.vulncheck.com/advisories/craft-cms-5.0.0-before-5.10.14-missing-authorizati… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-109306?
- CVE-2026-109306 is a medium-severity vulnerability in Craftcms Cms, classified under Missing Authorization. CVSS score: 5.9/10. Published 2026-10-12.
- How severe is CVE-2026-109306?
- Medium severity. CVSS v3 base score is 5.9 out of 10.