CVE-2026-71291

HIGH

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

Title source: cna
STIX 2.1

Description

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.

References (2)

Core 2
Core References
third-party-advisory
https://github.com/bolt/core

Scores

CVSS v3 8.8
EPSS 0.0047
EPSS Percentile 38.4%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-1336
Status published
Products (1)
bolt/core < 6.1
Published Aug 05, 2026
Tracked Since Aug 05, 2026