CVE-2026-107848
Severity CVSS v4.0:
Pending analysis
Type:
CWE-352
Cross-Site Request Forgery (CSRF)
Publication date:
09/10/2026
Last modified:
09/10/2026
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
Base Score 3.x
3.50
Severity 3.x
LOW