HTTP Request Smuggling Affecting io.undertow:undertow-core Open this link in a new tab package, versions [1.4.0.Final,1.4.17.Final) [1.3.0.Final,1.3.31.Final) [2.0.0.Alpha1,2.0.0.Beta1)

  • Attack Complexity


Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • snyk-id


  • published

    12 Feb 2018

  • disclosed

    3 Jan 2018

  • credit

    Stuart Douglas


io.undertow:undertow-core is a Java web server based on non-blocking IO.

Affected versions of this package are vulnerable to HTTP Request Smuggling. The code that parsed the HTTP request line allowed invalid characters in the query string and path parameters. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.

This is due to an incomplete fix for CVE-2017-2666.


Upgrade io.undertow:undertow-core to version 2.0.0.Alpha2, 1.4.17.Final, 1.3.31.Final or higher.