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https://issues.apache.org/jira/browse/TAP5-1004?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12914707#action_12914707
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Hudson commented on TAP5-1004:
------------------------------

Integrated in tapestry-5.2-freestyle #196 (See 
[https://hudson.apache.org/hudson/job/tapestry-5.2-freestyle/196/])
    TAP5-1004: URLEncode the exception message encoded as a response header and 
decode it on the client before displaying it to the user


> X-Tapestry-ErrorMessage may lead to HTTP Response Splitting
> -----------------------------------------------------------
>
>                 Key: TAP5-1004
>                 URL: https://issues.apache.org/jira/browse/TAP5-1004
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.1.0.5
>            Reporter: Paul Rehrl
>            Assignee: Howard M. Lewis Ship
>            Priority: Minor
>             Fix For: 5.2.1
>
>
> The DefaultRequestExceptionHandler sets the X-Tapestry-ErrorMessage header 
> but fails to sanitize or encode the error message. This enables an attacker 
> to inject malicious HTTP headers or to provide a 2nd HTTP response.

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