HTTP Request Smuggling Affecting io.undertow:undertow-core 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


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  • snyk-id


  • published

    12 Feb 2018

  • disclosed

    3 Jan 2018

  • credit

    Stuart Douglas

How to fix?

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


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.