CVE-2026-71291: Bolt Core

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

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 allow_twig flag and a regex checking for , , or ; when true, the raw field value is compiled and rendered via with no sandboxing.

Affected products

• Bolt Core: up to and including 6.1

Published 2026-08-05. Last modified 2026-08-26.