CVE-2026-3644

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>linux-rl9-python39</name>
	<range><lt>3.13.13</lt></range>
      </package>
      <package>
	<name>python27</name>
	<range><lt>3.13.13</lt></range>
      </package>
      <package>
	<name>python311</name>
	<range><lt>3.13.13</lt></range>
      </package>
      <package>
	<name>python312</name>
	<range><lt>3.13.13</lt></range>
      </package>
      <package>
	<name>python315</name>
	<range><lt>3.13.13</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>The fix for CVE-2026-0672, which rejected control characters in
	http.cookies.Morsel, was incomplete. The Morsel.update(), |= operator,
	and unpickling paths were not patched, allowing control characters to
	bypass input validation. Additionally, BaseCookie.js_output() lacked
	the output validation applied to BaseCookie.output().</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-3644</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-3644</url>
    </references>
    <dates>
      <discovery>2026-03-16</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>