CVE-2026-112777Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE

Descripción

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.

Datos: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Se publican tal como los indican las fuentes, en inglés.

Productos y versiones afectados

Referencias y parches

• GitHub Security Advisory (GHSA-w643-x88w-6wcm) vendor-advisory
• VulnCheck Advisory: Craft CMS before 4.18.8 and 5.11.0 Twig create() Blocklist Bypass Leading to RCE third-party-advisory