CVE-2026-71291
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
Bolt CMS renders content field values through Twig's full application-level Environment with no SandboxExtension registered. In src/Entity/Field.php, getTwigValue calls shouldBeRenderedAsTwig, which gates rendering only on the field definition's allow_twig flag and a regex, then compiles and renders the raw value without sandboxing.
Risk Assessment
An attacker can inject malicious Twig template code, potentially leading to remote code execution or unauthorized data access.
Recommendation
Update Bolt CMS to a version that registers SandboxExtension or restricts Twig rendering to trusted fields.
Other vulnerabilities in Bolt CMS
See all- CVE-2022-36532High
Bolt CMS version 5.1.12 and below contains a vulnerability that allows an authenticated user with ROLE_EDITOR privileges to upload and rename a malicious file, leading to remote code execution.
- CVE-2026-11511Low
In Bolt CMS up to version 3.7.5, in the TextType.php file of the HTML Attribute Handler component, manipulation of the style argument leads to HTML injection. The attack is remote, exploit is public. The GitHub repository is archived and read-only, and the product is no longer supported.
- CVE-2026-39229Medium
Bolt CMS up to version 3.7.0 contains an SQL injection vulnerability in the 'order' parameter of content listing pages. An authenticated attacker with low privileges can exploit this via the OrderDirective component, allowing extraction of sensitive information.
- CVE-2021-40219High
Bolt CMS version 4.2 and earlier is vulnerable to Remote Code Execution. Unsafe theme rendering allows an authenticated attacker to edit the theme and inject server-side template injection, leading to remote code execution.
Original NVD description (English source)
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.