Information Exposure Affecting io.undertow:undertow-core package, versions [,1.4.27.Final) [2.0.0.Final,2.0.15.Final)

  • Attack Complexity


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  • snyk-id


  • published

    6 May 2019

  • disclosed

    18 Sep 2018

  • credit

    Pedro Sampaio

How to fix?

Upgrade io.undertow:undertow-core to version 1.4.27.Final, 2.0.15.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 Information Exposure. If all headers were not written out in the first write() call then the code that handles flushing the buffer would always write out the full contents of the writevBuffer buffer, which might contain data from previous requests.