diff --git a/django/core/validators.py b/django/core/validators.py
index 57e8d6e054..3c731f1459 100644
--- a/django/core/validators.py
+++ b/django/core/validators.py
@@ -124,7 +124,10 @@ class URLValidator(RegexValidator):
         except ValidationError as e:
             # Trivial case failed. Try for possible IDN domain
             if value:
-                scheme, netloc, path, query, fragment = urlsplit(value)
+                try:
+                    scheme, netloc, path, query, fragment = urlsplit(value)
+                except ValueError:  # for example, "Invalid IPv6 URL"
+                    raise ValidationError(self.message, code=self.code)
                 try:
                     netloc = netloc.encode('idna').decode('ascii')  # IDN -> ACE
                 except UnicodeError:  # invalid domain part
diff --git a/tests/validators/invalid_urls.txt b/tests/validators/invalid_urls.txt
index 701dc991ed..04a0b5fb1b 100644
--- a/tests/validators/invalid_urls.txt
+++ b/tests/validators/invalid_urls.txt
@@ -56,3 +56,4 @@ http://aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.example.
 http://example.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.com
 http://example.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
 http://aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.aaaaaaaaaaaaaaaaaaaaaaaaa
+https://test.[com