diff --git a/flask_admin/base.py b/flask_admin/base.py
index d6dc49abd..bce8e242a 100644
--- a/flask_admin/base.py
+++ b/flask_admin/base.py
@@ -417,8 +417,9 @@ def _handle_view(self, name: str, **kwargs: dict[str, t.Any]) -> t.Any:
         :param kwargs:
             View function arguments
         """
+        # abort(403)
         if not self.is_accessible():
-            return self.inaccessible_callback(name, **kwargs)
+            return self.inaccessible_callback(name, **kwargs) or abort(403)
 
     def _run_view(
         self, fn: t.Callable[..., t.Any], *args: t.Any, **kwargs: t.Any
diff --git a/flask_admin/tests/test_base.py b/flask_admin/tests/test_base.py
index 778255db8..04c191599 100644
--- a/flask_admin/tests/test_base.py
+++ b/flask_admin/tests/test_base.py
@@ -320,6 +320,13 @@ def test_inaccessible_callback(app, admin):
     rv = client.get("/admin/mockview/")
     assert rv.status_code == 418
 
+    # if inaccessible_callback returns None
+    view.allow_access = False
+    view.inaccessible_callback = lambda *args, **kwargs: None  # type: ignore[method-assign]
+
+    rv = client.get("/admin/mockview/")
+    assert rv.status_code == 403
+
 
 def get_visibility(app, admin):
     view = MockView(name="TestMenuItem")