Signature Validation Bypass Affecting servicestack Open this link in a new tab package, versions [,5.9.2)

  • Attack Complexity


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  • snyk-id


  • published

    3 Nov 2020

  • disclosed

    3 Nov 2020

  • credit


How to fix?

Upgrade ServiceStack to version 5.9.2 or higher.


ServiceStack is a simple and fast alternative to WCF, MVC and Web API in one cohesive framework for all your services and web apps.

Affected versions of this package are vulnerable to Signature Validation Bypass. It mishandles JWT signature verification unless an application has a custom ValidateToken function that establishes a valid minimum length for a signature.