CVE-2026-71291
Bolt CMS Server-Side Template Injection via Unsandboxed allow_twig Field Rendering
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1336 |
| Vendor | bolt |
| Product | core |
| Published | Aug 5, 2026 |
| Last Updated | Aug 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
bolt / core
0 ≤ 6.1
References
Credits
Saidakbarxon Maxsudxonov