Write up and timeline of fixes reported by a Python core dev: <a href="https://python-security.readthedocs.io/vuln/urllib-query-string-semicolon-separator.html" rel="nofollow">https://python-security.readthedocs.io/vuln/urllib-query-str...</a><p>bugs.python.org tracker issue: <a href="https://bugs.python.org/issue42967" rel="nofollow">https://bugs.python.org/issue42967</a>