CVE-2026-107848 | BDVDB-2026-385149 Detail

Description#

Contao is an Open Source CMS. From version 4.0.0 until 5.3.50 and 5.7.12, RequestTokenListener validates REQUEST_TOKEN 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 without a CSRF token when an authenticated backend user loads an attacker-controlled URL. Reachable actions remain limited to modules available to that user, and the advisory demonstrates destructive or state-changing actions rather than privilege escalation. This issue is fixed in versions 5.3.50 and 5.7.12.

Impact#

Weaknesses#

References#

Exploit#

History#

1. Version 12026-10-09Record published in the CVE List.
2. Version 22026-10-13Most recent update recorded in the CVE List.