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https://issues.apache.org/jira/browse/CAMEL-25704?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18128715#comment-18128715
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Claus Ibsen commented on CAMEL-25704:
-------------------------------------
Merged the backports and the upgrade-guide sync: camel-4.18.x in
https://github.com/apache/camel/pull/28064 (commit a3a022832915, 4.18.6),
camel-4.22.x in https://github.com/apache/camel/pull/28065 (commit
76de7e66dec8, 4.22.3), and the 4.22.3 / 4.18.6 upgrade-guide notes on main in
https://github.com/apache/camel/pull/28078 (commit 02563254b8fd).
_Claude Code on behalf of Claus Ibsen_
> camel-undertow - the producer refuses a request target or header value it
> cannot write as it is
> -----------------------------------------------------------------------------------------------
>
> Key: CAMEL-25704
> URL: https://issues.apache.org/jira/browse/CAMEL-25704
> Project: Camel
> Issue Type: Bug
> Components: camel-core, camel-undertow
> Reporter: Andrea Cosentino
> Assignee: Andrea Cosentino
> Priority: Major
> Fix For: 4.18.6, 4.22.3, 4.24.0
>
>
> The undertow producer writes the path, query and header values of the
> outgoing HTTP request to the socket one character at a time, without
> validating them. A control character such as a carriage return or line feed
> was therefore written into the request line or a header line, producing a
> malformed request, and a character above 0xFF was narrowed to a single,
> different byte (for example U+010A was written as a line feed).
> The producer decodes a percent-encoded CamelHttpPath or CamelHttpQuery before
> building the request target (URISupport.pathAndQueryOf uses the decoded
> URI.getPath() and URI.getQuery()), so a percent-encoded control character in
> those headers became a real control character at that point.
> Expected: the producer refuses to send a request path, query or header value
> that contains a control character or a character above 0xFF, failing the
> exchange instead. A space and a tab, which do not change the request framing,
> are still allowed.
> Note: the decoding of CamelHttpPath/CamelHttpQuery is kept for compatibility.
> The rest producer double-encodes its query parameters and relies on the
> undertow producer decoding once (CAMEL-15410), so the fix keeps the decoding
> and only refuses characters that cannot be written as they are.
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