1 files changed, 7 insertions, 1 deletions
diff --git a/actionpack/lib/abstract_controller/rendering.rb b/actionpack/lib/abstract_controller/rendering.rb
index a73f188623..63fd76d9b7 100644
--- a/actionpack/lib/abstract_controller/rendering.rb
+++ b/actionpack/lib/abstract_controller/rendering.rb
@@ -82,7 +82,13 @@ module AbstractController
     # <tt>render :file => "foo/bar"</tt>.
     # :api: plugin
     def _normalize_args(action=nil, options={})
-      if action.is_a? Hash
+      case action
+      when ActionController::Parameters
+        unless action.permitted?
+          raise ArgumentError, "render parameters are not permitted"
+        end
+        action
+      when Hash
         action
       else
         options