CVE-2021-23336

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>python27</name>
	<range><lt>3.6.13</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>The package python/cpython from 0 and before 3.6.13, from 3.7.0 and
	before 3.7.10, from 3.8.0 and before 3.8.8, from 3.9.0 and before
	3.9.2 are vulnerable to Web Cache Poisoning via urllib.parse.parse_qsl
	and urllib.parse.parse_qs by using a vector called parameter cloaking.
	When the attacker can separate query parameters using a semicolon (;),
	they can cause a difference in the interpretation of the request
	between the proxy (running with default configuration) and the server.
	This can result in malicious requests being cached as completely safe
	ones, as the proxy would usually not see the semicolon as a separator,
	and therefore would not include it in a cache key of an unkeyed
	parameter.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2021-23336</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2021-23336</url>
    </references>
    <dates>
      <discovery>2021-02-15</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>