CVE-2026-42581

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>netty</name>
	<range><lt>4.1.133</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Netty is an asynchronous, event-driven network application framework.
	Prior to 4.2.13.Final and 4.1.133.Final, HttpObjectDecoder strips a
	conflicting Content-Length header when a request carries both
	Transfer-Encoding: chunked and Content-Length, but only for HTTP/1.1
	messages. The guard is absent for HTTP/1.0. An attacker that sends an
	HTTP/1.0 request with both headers causes Netty to decode the body as
	chunked while leaving Content-Length intact in the forwarded
	HttpMessage. Any downstream proxy or handler that trusts
	Content-Length over Transfer-Encoding will disagree on message
	boundaries, enabling request smuggling. This vulnerability is fixed in
	4.2.13.Final and 4.1.133.Final.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-42581</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-42581</url>
    </references>
    <dates>
      <discovery>2026-05-13</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>