CVE-2026-71291

8.8 HIGHpublic exploit available

Published 2026-08-05 · Updated 2026-08-10

AI risk analysis

Summary: The flaw allows untrusted content to be executed as Twig templates, leading to Remote Code Execution (RCE) due to the lack of sandboxing.
Exploitability: Exploitation is moderately hard as it requires crafting a payload that triggers the allow_twig flag and includes malicious code.
Blast radius: If exploited, this could lead to full compromise of the affected system, including data theft and control of the server.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Disable the allow_twig feature or update to the latest version of Bolt CMS that addresses this vulnerability.

rcewebcmstwigsandbox

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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 vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-1336

Public exploit & PoC references

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.