HIGH 8.7 NVD
CVE-2026-112777
Craft CMS 4.x before 4.18.8 and 5.x before 5.11.0 contains a blocklist bypass in the Twig create() function because its class-name checks are case-sensitive whi
Craft CMS 4.x before 4.18.8 and 5.x before 5.11.0 contains a blocklist bypass in the Twig create() function because its class-name checks are case-sensitive while PHP class resolution is not. Attackers with template-execution rights, such as Control Panel administrators, can instantiate SplFileObject via a lowercase class name to read .env secrets or write a PHP file into the webroot for remote code execution.
References
- https://github.com/craftcms/cms/security/advisories/GHSA-w643-x88w-6wcm
- https://www.vulncheck.com/advisories/craft-cms-before-4.18.8-and-5.11.0-twig-create-blockl
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-10-19 via NVD.
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