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dotnet · DotVVMCritical

DotVVM AuthorizeActionFilter broken, allows unauthorized access

The AuthorizeActionFilter class is broken and does nothing, allowing unauthorized access.

20 Jun 2026Read 1 minSeverity: act now

What changed

The AuthorizeActionFilter class is broken and does nothing, allowing unauthorized access. Fixed in versions 4.3.15, 4.2.11, and 5.0.0-preview09.

Who it affects

All users of the AuthorizeActionFilter class.

What to do today

Upgrade to a patched version or replace AuthorizeActionFilter with AuthorizeAttribute as a workaround.

The trail
Collected Audited Written Published