Vulnerability details
CVE-2026-71291
bolt core
Bolt CMS Server-Side Template Injection via Unsandboxed allow_twig Field Rendering
CVSS 3.1
8.8High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 8.8High | 3.1 | CVEProject cvelistV5 (CNA) (TuranSec) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| bolt | core | v ≤ 6.1 | CVEProject cvelistV5 (CNA) |
References and advisories
2- https://github.com/bolt/core third-party-advisory
- https://github.com/bolt/core/blob/6.1/src/Entity/Field.php third-party-advisory
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Details
- Published
- 2026-08-05
- Last updated
- 2026-08-10
- State
- Published
- Assigner (CNA)
- TuranSec
Exploit prediction (EPSS)
0.54%
Probability of exploitation in 30 days
46.2%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-1336