Fixed #26269 -- Prohibited spaces in is_valid_ipv6_address().

django/utils/ipv6.py

@@ -1,6 +1,8 @@
 # This code was mostly based on ipaddr-py
 # Copyright 2007 Google Inc. https://github.com/google/ipaddr-py
 # Licensed under the Apache License, Version 2.0 (the "License").
+import re
+
 from django.core.exceptions import ValidationError
 from django.utils.six.moves import range
 from django.utils.translation import ugettext_lazy as _
@@ -155,6 +157,10 @@ def is_valid_ipv6_address(ip_str):
     """
     from django.core.validators import validate_ipv4_address
 
+    symbols_re = re.compile(r'^[0-9a-fA-F:.]+$')
+    if not symbols_re.match(ip_str):
+        return False
+
     # We need to have at least one ':'.
     if ':' not in ip_str:
         return False

tests/utils_tests/test_ipv6.py

@@ -28,6 +28,8 @@ class TestUtilsIPv6(unittest.TestCase):
         self.assertFalse(is_valid_ipv6_address('1::2:3:4:5:6:7:8'))
         self.assertFalse(is_valid_ipv6_address('1:2'))
         self.assertFalse(is_valid_ipv6_address('1:::2'))
+        self.assertFalse(is_valid_ipv6_address('fe80::223: 6cff:fe8a:2e8a'))
+        self.assertFalse(is_valid_ipv6_address('2a02::223:6cff :fe8a:2e8a'))
 
     def test_validates_incorrect_with_v4mapping(self):
         self.assertFalse(is_valid_ipv6_address('::ffff:999.42.16.14'))