Add mismatched bracket test cases, fix news format

Author: sethmlarson

Lib/test/test_urlparse.py

@@ -1426,6 +1426,16 @@ def test_invalid_bracketed_hosts(self):
         self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://[::1].suffix?')
         self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://user@prefix.[v6a.ip]')
         self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://user@[v6a.ip].suffix')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://[v6a.ip')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://v6a.ip]')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://]v6a.ip[')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://]v6a.ip')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://v6a.ip[')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://prefix.[v6a.ip')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://v6a.ip].suffix')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://prefix]v6a.ip[suffix')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://prefix]v6a.ip')
+        self.assertRaises(ValueError, urllib.parse.urlsplit, 'scheme://v6a.ip[suffix')
 
     def test_splitting_bracketed_hosts(self):
         p1 = urllib.parse.urlsplit('scheme://user@[v6a.ip]/path?query')

Misc/NEWS.d/next/Security/2025-01-28-14-08-03.gh-issue-105704.EnhHxu.rst

@@ -1,4 +1,4 @@
-When using :func:`urllib.parse.urlsplit()` and :func:`urllib.parse.urlparse()` host parsing would
-not reject domain names containing square brackets (``[`` and ``]``). Square
-brackets are only valid for IPv6 and IPvFuture hosts according to `RFC 3986
-Section 3.2.2 <https://www.rfc-editor.org/rfc/rfc3986#section-3.2.2>`__.
+When using :func:`urllib.parse.urlsplit` and :func:`urllib.parse.urlparse` host
+parsing would not reject domain names containing square brackets (``[`` and
+``]``). Square brackets are only valid for IPv6 and IPvFuture hosts according to
+`RFC 3986 Section 3.2.2 <https://www.rfc-editor.org/rfc/rfc3986#section-3.2.2>`__.