Is CVE-2026-109306 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-109306 being exploited in the wild.

How severe is CVE-2026-109306?

Medium severity, with a CVSS score of 5.9, published 12 October 2026.

Which products and versions are affected?

Craft CMS CMS 5.0.0 before 5.10.14.

Is there a fix for CVE-2026-109306?

Yes: fixed in 5.10.14. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-109306 attacked?

It is attacked over the network, in a web application.

Am I affected by CVE-2026-109306?

Check whether you run Craft CMS CMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-109306: Craft CMS missing authorization in app/switch-to-licensed-edition

CVE-2026-109306 · Severity: medium · CVSS 5.9 · Published 2026-10-12

Craft CMS is a content management system used to build and manage websites. A vulnerability in versions 5.0.0 through 5.10.13 allows any logged-in user, including those with no administrative privileges, to permanently downgrade the site's software edition by calling an unprotected endpoint. This change persists across the site and cannot be reversed by administrators through the normal control panel interface.

Technologies: Craft CMS CMS. Vendors: Craft CMS.

Quick answers

Is CVE-2026-109306 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-109306 being exploited in the wild.
How severe is CVE-2026-109306?: Medium severity, with a CVSS score of 5.9, published 12 October 2026.
Which products and versions are affected?: Craft CMS CMS 5.0.0 before 5.10.14.
Is there a fix for CVE-2026-109306?: Yes: fixed in 5.10.14. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-109306 attacked?: It is attacked over the network, in a web application.
Am I affected by CVE-2026-109306?: Check whether you run Craft CMS CMS at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

Fixed in: 5.10.14

Technical details

AppController::actionSwitchToLicensedEdition() lacks authorization checks (no requireAdmin(), requirePermission(), or requireCpRequest() calls), allowing any authenticated user to invoke it and modify the licensed edition stored in project config. The endpoint is normally called by an admin-only UI banner when Craft detects a mismatch between the installed and licensed editions; the absence of server-side authorization allows low-privileged or front-end users to trigger the downgrade when this condition exists. The persistent change to project config cannot be reversed via the control panel, forcing recovery through out-of-band editing or license correction.

Affected products

Craft CMS CMS 5.0.0 before 5.10.14

Timeline

2026-09-22: disclosed
2026-10-12: advisory

References

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