CVE-2026-26274: October CMS October

Medium severity, CVSS 6.6. EPSS: 0.4% chance of exploitation in the next 30 days.

October is a Content Management System (CMS) and web platform. Prior to 3.7.14 and 4.1.10, a vulnerability was identified in the Twig sandbox security policy that allowed database write operations when cms.safe_mode is enabled. Backend users with Developer permissions could use Twig template markup to execute insert, update, and delete operations on any database table through the query builder, which is included in the sandbox allow-list. This vulnerability is fixed in 3.7.14 and 4.1.10.

Affected products

• October CMS October: from 4.0.0, before 4.1.10 (fixed in 4.1.10); before 3.7.14 (fixed in 3.7.14)

Published 2026-04-21. Last modified 2026-06-17.