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Diffstat (limited to 'Doc/whatsnew/3.9.rst')
-rw-r--r--Doc/whatsnew/3.9.rst15
1 files changed, 14 insertions, 1 deletions
diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst
index b94f1bfaddf..5f4f8ba211b 100644
--- a/Doc/whatsnew/3.9.rst
+++ b/Doc/whatsnew/3.9.rst
@@ -1515,4 +1515,17 @@ need to account for this change. A :exc:`DeprecationWarning` may be emitted for
invalid forms of parameterizing :class:`collections.abc.Callable` which may have
passed silently in Python 3.9.1. This :exc:`DeprecationWarning` will
become a :exc:`TypeError` in Python 3.10.
-(Contributed by Ken Jin in :issue:`42195`.) \ No newline at end of file
+(Contributed by Ken Jin in :issue:`42195`.)
+
+urllib.parse
+------------
+
+Earlier Python versions allowed using both ";" and "&" as
+query parameter separators in :func:`urllib.parse.parse_qs` and
+:func:`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
+:func:`cgi.parse` and :func:`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 :issue:`42967`.)