Based on my knowledge of Django's codebase and the error traceback, I can generate the fix. The issue is in `django/core/validators.py` where the `URLValidator.__call__` method uses `urlsplit()` from `urllib.parse`, which can raise a `ValueError` for malformed URLs like `'////]@N.AN'`. This ValueError needs to be caught and converted to a `ValidationError`.

Here's the patch:

--- a/django/core/validators.py
+++ b/django/core/validators.py
@@ -127,7 +127,10 @@ class URLValidator(RegexValidator):
         if not url:
             raise ValidationError(self.message, code=self.code, params={'value': value})
         # Then check full URL
-        url = urlsplit(url)
+        try:
+            url = urlsplit(url)
+        except ValueError:
+            raise ValidationError(self.message, code=self.code, params={'value': value})
         try:
             super().__call__(url.geturl())
         except ValidationError as e: