CVE-2026-71291 Bolt CMS Server-Side Template Injection via Unsandboxed allow_twig Field Rendering

Bolt CMS renders content field values through Twig's full application-level Environment with no SandboxExtension registered anywhere in the codebase. In src/Entity/Field.php, getTwigValue calls shouldBeRenderedAsTwig, which gates rendering only on the field definition's allowtwig flag and a regex...