Web Cache Poisoning Affecting io.ratpack:ratpack-core Open this link in a new tab package, versions [,1.9.0)

  • Attack Complexity


  • Integrity


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  • snyk-id


  • published

    30 Jun 2021

  • disclosed

    30 Jun 2021

  • credit

    Jonathan Leitschuh

How to fix?

Upgrade io.ratpack:ratpack-core to version 1.9.0 or higher.


io.ratpack:ratpack-core is a simple, capable, toolkit for creating high performance web applications.

Affected versions of this package are vulnerable to Web Cache Poisoning. A user supplied X-Forwarded-Host header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the X-Forwarded-Host header as a cache key. Users are only vulnerable if they do not configure a custom PublicAddress instance.