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CVE details

CVE-2026-59903

Netty is an asynchronous, event-driven network application framework. Prior to 4.1.137.Final and 4.2.17.Final, io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces application Vary headers such as Authorization or Cookie with Origin, allowing a caching proxy or CDN to reuse authenticated responses across users and disclose sensitive information. This issue is fixed in versions 4.1.137.Final and 4.2.17.Final.

Score
6.5 medium
Published
2026-08-17
Links
NVD · cve.org

Affected ports (1)

PortPackageVersionStatusMaintainer
java/nettynetty4.1.53_2unaddressedglewis@FreeBSD.org

VuXML

Template for a VuXML entry

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>4.1.137</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 4.1.137.Final and 4.2.17.Final,
	io.netty.handler.codec.http.cors.CorsHandler setVaryHeader replaces
	application Vary headers such as Authorization or Cookie with Origin,
	allowing a caching proxy or CDN to reuse authenticated responses
	across users and disclose sensitive information. This issue is fixed
	in versions 4.1.137.Final and 4.2.17.Final.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-59903</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-59903</url>
    </references>
    <dates>
      <discovery>2026-08-17</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>