Note: The release you're looking at is Python 3.8.8, a bugfix release for the
legacy 3.8 series. Python 3.9 is now the latest feature release series of
Python 3.
Notable changes in Python 3.8.8
Earlier Python versions allowed using both ; and & as query parameter
separators in urllib.parse.parse_qs() and urllib.parse.parse_qsl(). Due to
security concerns, and to conform with newer W3C recommendations, this has been
changed to allow only a single separator key, with & as the default. This
change also affects cgi.parse() and cgi.parse_multipart() as they use the
affected functions internally. For more details, please see their respective
documentation. (Contributed by Adam Goldschmidt, Senthil Kumaran and Ken Jin
in bpo-42967.)
