diff --git a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
index f9e81a02d3..b32e7be31f 100644
--- a/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
+++ b/actionpack/lib/action_dispatch/middleware/show_exceptions.rb
@@ -6,7 +6,7 @@ module ActionDispatch
   # This middleware rescues any exception returned by the application and renders
   # nice exception pages if it's being rescued locally.
   class ShowExceptions
-    LOCALHOST = ['127.0.0.1', '::1'].freeze
+    LOCALHOST = [/^127\.0\.0\.\d{1,3}$/, /^::1$/, /^0:0:0:0:0:0:0:1(%.*)?$/].freeze
 
     RESCUES_TEMPLATE_PATH = File.join(File.dirname(__FILE__), 'templates')
 
@@ -114,7 +114,7 @@ def rescue_action_in_public(exception)
 
       # True if the request came from localhost, 127.0.0.1.
       def local_request?(request)
-        LOCALHOST.any?{ |local_ip| request.remote_addr == local_ip && request.remote_ip == local_ip }
+        LOCALHOST.any?{ |local_ip| request.remote_addr =~ local_ip && request.remote_ip =~ local_ip }
       end
 
       def status_code(exception)
diff --git a/actionpack/test/dispatch/show_exceptions_test.rb b/actionpack/test/dispatch/show_exceptions_test.rb
index b447b0715c..4966527f4d 100644
--- a/actionpack/test/dispatch/show_exceptions_test.rb
+++ b/actionpack/test/dispatch/show_exceptions_test.rb
@@ -53,7 +53,7 @@ class ShowExceptionsTest < ActionController::IntegrationTest
 
   test "rescue locally from a local request" do
     @app = ProductionApp
-    ['127.0.0.1', '::1'].each do |ip_address|
+    ['127.0.0.1', '127.0.0.127', '::1', '0:0:0:0:0:0:0:1', '0:0:0:0:0:0:0:1%0'].each do |ip_address|
       self.remote_addr = ip_address
 
       get "/", {}, {'action_dispatch.show_exceptions' => true}