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CVE details

CVE-2026-33930

Apache Traffic Server copies the client Host header into a fixed-size stack buffer without a bound during redirect handling, so an over-long Host header overflows the stack when redirect following is enabled. This issue affects Apache Traffic Server: from 8.0.0 through 8.1.11, from 9.0.0 through 9.2.14, from 10.0.0 through 10.1.3. Users are recommended to upgrade to version 9.2.15 or 10.1.4, which fix the issue.

Score
8.2 high
Published
2026-07-29
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
www/trafficservertrafficserver10.1.0unaddressedgaod@hychen.org

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>trafficserver</name>
	<range><lt>9.2.15</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Apache Traffic Server copies the client Host header into a fixed-size
	stack buffer without a bound during redirect handling, so an over-long
	Host header overflows the stack when redirect following is
	enabled.



This issue affects Apache Traffic Server: from 8.0.0
	through 8.1.11, from 9.0.0 through 9.2.14, from 10.0.0 through
	10.1.3.



Users are recommended to upgrade to version 9.2.15 or
	10.1.4, which fix the issue.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-33930</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-33930</url>
    </references>
    <dates>
      <discovery>2026-07-29</discovery>
      <entry>2026-10-26</entry>
    </dates>
  </vuln>