Riganti DotVVM up to 4.2.10/4.3.14 AuthorizeActionFilter improper authorization

Summaryinfo

A vulnerability was found in Riganti DotVVM up to 4.2.10/4.3.14. It has been rated as critical. Affected is the function OnCommandExecutingAsync/OnViewModelCreatedAsync/OnPresenterExecutingAsync of the component AuthorizeActionFilter. The manipulation leads to improper authorization. This vulnerability is referenced as CVE-2026-57578. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Riganti DotVVM up to 4.2.10/4.3.14 and classified as critical. This issue affects the function OnCommandExecutingAsync/OnViewModelCreatedAsync/OnPresenterExecutingAsync of the component AuthorizeActionFilter. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

DotVVM is an open source MVVM framework for web applications. Prior to 4.2.11, 4.3.15, and 5.0.0-preview09-final, AuthorizeActionFilter performs no authorization because its explicit ICommandActionFilter.OnCommandExecutingAsync, IViewModelActionFilter.OnViewModelCreatedAsync, and IPresenterActionFilter.OnPresenterExecutingAsync implementations return completed tasks instead of invoking the corresponding checks. Applications relying on this filter can therefore expose protected commands, view models, or presenters to unauthorized requests without any special bypass technique. AuthorizeAttribute correctly implements the same interfaces and can be used as a workaround. This issue is fixed in versions 4.2.11, 4.3.15, and 5.0.0-preview09-final.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-57578 since 06/24/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 4.2.11, 4.3.15 or 5.0.0-preview09-final eliminates this vulnerability.

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Productinfo

Vendor

• Riganti

Name

• DotVVM

Version

• 4.2.0
• 4.2.1
• 4.2.2
• 4.2.3
• 4.2.4
• 4.2.5
• 4.2.6
• 4.2.7
• 4.2.8
• 4.2.9
• 4.2.10
• 4.3.0
• 4.3.1
• 4.3.2
• 4.3.3
• 4.3.4
• 4.3.5
• 4.3.6
• 4.3.7
• 4.3.8
• 4.3.9
• 4.3.10
• 4.3.11
• 4.3.12
• 4.3.13
• 4.3.14

Website

• Product: https://github.com/riganti/dotvvm/

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