CVE-2026-71291CWE-1336

CVE-2026-71291

High · published August 5, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
45.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00549 · 45.2th percentile
Weakness
CWE-1336 · Improper Neutralization of Special Elements Used in a Template Engine
Published
2026-08-05T17:24Z
References (2)
https://github.com/bolt/core · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://github.com/bolt/core/blob/6.1/src/Entity/Field.php · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
EPSS history
Timeline
  • 05 AUG 12:38Z
    Bolt CMS Server-Side Template Injection via Unsandboxed allow_twig Field Rendering
    cvelistv5