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CVE details

CVE-2026-34531

Flask-HTTPAuth provides Basic, Digest and Token HTTP authentication for Flask routes. Prior to version 4.8.1, in a situation where the client makes a request to a token protected resource without passing a token, or passing an empty token, Flask-HTTPAuth would invoke the application's token verification callback function with the token argument set to an empty string. If the application had any users in its database with an empty string set as their token, then it could potentially authenticate the client request against any of those users. This issue has been patched in version 4.8.1.

Score
6.5 medium
Published
2026-04-01
Links
NVD · cve.org · Report wrong data

Matched ports (1)

PortPackageVersionStatusMaintainer
security/py-flask-httpauthpy312-Flask-HTTPAuth4.8.0unaddressedrm@FreeBSD.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>py312-Flask-HTTPAuth</name>
	<range><lt>4.8.1</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>Flask-HTTPAuth provides Basic, Digest and Token HTTP authentication
	for Flask routes. Prior to version 4.8.1, in a situation where the
	client makes a request to a token protected resource without passing a
	token, or passing an empty token, Flask-HTTPAuth would invoke the
	application's token verification callback function with the token
	argument set to an empty string. If the application had any users in
	its database with an empty string set as their token, then it could
	potentially authenticate the client request against any of those
	users. This issue has been patched in version 4.8.1.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-34531</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-34531</url>
    </references>
    <dates>
      <discovery>2026-04-01</discovery>
      <entry>2026-10-27</entry>
    </dates>
  </vuln>