CVE-2026-107848

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.

CVSS v3 3.5 LOW

3.5^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.1 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/contao/contao/commit/34dd27ee6739f10568d3d95d8784862255c925b4
https://github.com/contao/contao/releases/tag/5.7.12
https://github.com/contao/contao/security/advisories/GHSA-9ff2-p842-45wq

Configurations

No configuration.

History

09 Oct 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-09 21:17

Updated : 2026-10-16 17:17

NVD link : CVE-2026-107848

Mitre link : CVE-2026-107848

CVE.ORG link : CVE-2026-107848

JSON object : View

Products Affected

No product.

CWE

CWE-352

Cross-Site Request Forgery (CSRF)

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