CVE-2026-107848 Contao: Cross-site request forgery in custom backend actions

Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, RequestTokenListener validates REQUESTTOKEN only for POST requests, while the declarative GET guard runs only when an act parameter is present. Backend actions dispatched through the key parameter can therefore execute...

Cross-site request forgery in custom backend actions (see GHSA-9ff2-p842-45wq)

More info at https://contao.org/en/security-advisories/cross-site-request-forgery-in-custom-backend-actions...

Cross-site request forgery in custom backend actions (see GHSA-9ff2-p842-45wq)

More info at https://contao.org/en/security-advisories/cross-site-request-forgery-in-custom-backend-actions...