CVE-2026-57578 DotVVM: Missing authorization in AuthorizeActionFilter
Attackers can access protected commands and view models in DotVVM applications because the authorization filter fails to perform checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-57578?
CVE-2026-57578 is a critical missing authorization vulnerability in riganti dotvvm, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-862
Which versions are affected by CVE-2026-57578?
How do I fix CVE-2026-57578?
No fix has been published for CVE-2026-57578 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-57578 being exploited?
There is no known exploitation of CVE-2026-57578 in the wild and no public exploit code.
Sources
Also known as GHSA-c8qj-jx8j-fg2w.