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CVE details

CVE-2026-4519

The webbrowser.open() API would accept leading dashes in the URL which could be handled as command line options for certain web browsers. New behavior rejects leading dashes. Users are recommended to sanitize URLs prior to passing to webbrowser.open().

Score
7.0 high
Published
2026-03-20
Links
NVD · cve.org

Affected ports (5)

PortPackageVersionStatusMaintainer
lang/linux-rl9-python3linux-rl9-python393.9.25unaddressedemulation@FreeBSD.org
lang/python27python272.7.18_5unaddressedpython@FreeBSD.org
lang/python315python3153.15.0unaddressedpython@FreeBSD.org
lang/python311python3113.11.17fixedpython@FreeBSD.org
lang/python312python3123.12.15fixedpython@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>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>python315</name>
	<range><lt>3.13.13</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>The webbrowser.open() API would accept leading dashes in the URL which
	
could be handled as command line options for certain web browsers.
	New 
behavior rejects leading dashes. Users are recommended to
	sanitize URLs 
prior to passing to webbrowser.open().</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-4519</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-4519</url>
    </references>
    <dates>
      <discovery>2026-03-20</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>