diff --git a/netbox/dcim/tests/test_views.py b/netbox/dcim/tests/test_views.py
index 1643e381a..6636abaaa 100644
--- a/netbox/dcim/tests/test_views.py
+++ b/netbox/dcim/tests/test_views.py
@@ -1038,6 +1038,42 @@ module-bays:
         self.assertHttpStatus(response, 200)
         self.assertContains(response, "Record 2 module-bays[3].name: This field is required.")
 
+    @override_settings(EXEMPT_VIEW_PERMISSIONS=['*'])
+    def test_import_nolist(self):
+        # Add all required permissions to the test user
+        self.add_permissions(
+            'dcim.view_devicetype',
+            'dcim.add_devicetype',
+            'dcim.add_consoleporttemplate',
+            'dcim.add_consoleserverporttemplate',
+            'dcim.add_powerporttemplate',
+            'dcim.add_poweroutlettemplate',
+            'dcim.add_interfacetemplate',
+            'dcim.add_frontporttemplate',
+            'dcim.add_rearporttemplate',
+            'dcim.add_modulebaytemplate',
+            'dcim.add_devicebaytemplate',
+            'dcim.add_inventoryitemtemplate',
+        )
+
+        for value in ('', 'null', '3', '"My console port"', '{name: "My other console port"}'):
+            with self.subTest(value=value):
+                import_data = f'''
+manufacturer: Manufacturer 1
+model: TEST-3000
+slug: test-3000
+u_height: 1
+console-ports: {value}
+'''
+                form_data = {
+                    'data': import_data,
+                    'format': 'yaml'
+                }
+
+                response = self.client.post(reverse('dcim:devicetype_bulk_import'), data=form_data, follow=True)
+                self.assertHttpStatus(response, 200)
+                self.assertContains(response, "Record 1 console-ports: Must be a list.")
+
     def test_export_objects(self):
         url = reverse('dcim:devicetype_list')
         self.add_permissions('dcim.view_devicetype')
diff --git a/netbox/netbox/views/generic/bulk_views.py b/netbox/netbox/views/generic/bulk_views.py
index 4b8bc61e9..7dc8e4d2e 100644
--- a/netbox/netbox/views/generic/bulk_views.py
+++ b/netbox/netbox/views/generic/bulk_views.py
@@ -381,8 +381,17 @@ class BulkImportView(GetReturnURLMixin, BaseMultiObjectView):
         # Iterate through the related object forms (if any), validating and saving each instance.
         for field_name, related_object_form in self.related_object_forms.items():
 
+            related_objects = model_form.data.get(field_name, list())
+            if not isinstance(related_objects, list):
+                raise ValidationError(
+                    self._compile_form_errors(
+                        {field_name: [_("Must be a list.")]},
+                        index=parent_idx
+                    )
+                )
+
             related_obj_pks = []
-            for i, rel_obj_data in enumerate(model_form.data.get(field_name, list()), start=1):
+            for i, rel_obj_data in enumerate(related_objects, start=1):
                 rel_obj_data = self.prep_related_object_data(obj, rel_obj_data)
                 f = related_object_form(rel_obj_data)