diff --git a/Gemfile b/Gemfile
index 7546bc43c807f..43d2b165d293c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,6 +38,9 @@ gem "json", ">= 2.0.0", "!=2.7.0"
 # Workaround until Ruby ships with cgi version 0.3.6 or higher.
 gem "cgi", ">= 0.3.6", require: false
 
+# Workaround until all supported Ruby versions ship with uri version 0.13.1 or higher.
+gem "uri", ">= 0.13.1", require: false
+
 gem "prism"
 
 group :lint do
diff --git a/Gemfile.lock b/Gemfile.lock
index 55cd2439bb76e..312a997fbe7d1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -96,6 +96,7 @@ PATH
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
     rails (8.0.0.alpha)
       actioncable (= 8.0.0.alpha)
       actionmailbox (= 8.0.0.alpha)
@@ -596,6 +597,7 @@ GEM
       concurrent-ruby (~> 1.0)
     uber (0.1.0)
     unicode-display_width (2.5.0)
+    uri (0.13.1)
     useragent (0.16.10)
     w3c_validators (1.3.7)
       json (>= 1.8)
@@ -701,6 +703,7 @@ DEPENDENCIES
   trilogy (>= 2.7.0)
   turbo-rails
   tzinfo-data
+  uri (>= 0.13.1)
   useragent
   w3c_validators (~> 1.3.6)
   wdm (>= 0.1.0)
diff --git a/actionpack/lib/action_dispatch/routing/inspector.rb b/actionpack/lib/action_dispatch/routing/inspector.rb
index 75287996109f8..c06a0053c8d76 100644
--- a/actionpack/lib/action_dispatch/routing/inspector.rb
+++ b/actionpack/lib/action_dispatch/routing/inspector.rb
@@ -101,7 +101,7 @@ def normalize_filter(filter)
             { controller: /#{filter[:controller].underscore.sub(/_?controller\z/, "")}/ }
           elsif filter[:grep]
             grep_pattern = Regexp.new(filter[:grep])
-            path = URI::DEFAULT_PARSER.escape(filter[:grep])
+            path = URI::RFC2396_PARSER.escape(filter[:grep])
             normalized_path = ("/" + path).squeeze("/")
 
             {
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 1b3b0203ec1f5..0a90de854d6dd 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -2033,7 +2033,7 @@ def add_route(action, controller, options, _path, to, via, formatted, anchor, op
               name_for_action(options.delete(:as), action)
             end
 
-            path = Mapping.normalize_path URI::DEFAULT_PARSER.escape(path), formatted
+            path = Mapping.normalize_path URI::RFC2396_PARSER.escape(path), formatted
             ast = Journey::Parser.parse path
 
             mapping = Mapping.build(@scope, @set, ast, controller, default_action, to, via, formatted, options_constraints, anchor, options)
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index e4669afc8b11c..5ed211bd46c9d 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -929,7 +929,7 @@ def recognize_path_with_request(req, path, extras, raise_on_missing: true)
           params.each do |key, value|
             if value.is_a?(String)
               value = value.dup.force_encoding(Encoding::BINARY)
-              params[key] = URI::DEFAULT_PARSER.unescape(value)
+              params[key] = URI::RFC2396_PARSER.unescape(value)
             end
           end
           req.path_parameters = params
diff --git a/actionpack/test/controller/parameter_encoding_test.rb b/actionpack/test/controller/parameter_encoding_test.rb
index ab15c5dccd468..ab59cecbb85fe 100644
--- a/actionpack/test/controller/parameter_encoding_test.rb
+++ b/actionpack/test/controller/parameter_encoding_test.rb
@@ -56,7 +56,7 @@ class ParameterEncodingTest < ActionController::TestCase
   end
 
   test "does not raise an error when passed a param declared as ASCII-8BIT that contains invalid bytes" do
-    get :test_skip_parameter_encoding, params: { "bar" => URI::DEFAULT_PARSER.escape("bar\xE2baz".b) }
+    get :test_skip_parameter_encoding, params: { "bar" => URI::RFC2396_PARSER.escape("bar\xE2baz".b) }
 
     assert_response :success
     assert_equal "ASCII-8BIT", @response.body
diff --git a/actionpack/test/controller/routing_test.rb b/actionpack/test/controller/routing_test.rb
index 119a40e273de3..4e150f5277407 100644
--- a/actionpack/test/controller/routing_test.rb
+++ b/actionpack/test/controller/routing_test.rb
@@ -2179,11 +2179,11 @@ def test_extras
   end
 
   def test_unicode_path
-    assert_equal({ controller: "news", action: "index" }, @routes.recognize_path(URI::DEFAULT_PARSER.escape("こんにちは/世界"), method: :get))
+    assert_equal({ controller: "news", action: "index" }, @routes.recognize_path(URI::RFC2396_PARSER.escape("こんにちは/世界"), method: :get))
   end
 
   def test_downcased_unicode_path
-    assert_equal({ controller: "news", action: "index" }, @routes.recognize_path(URI::DEFAULT_PARSER.escape("こんにちは/世界").downcase, method: :get))
+    assert_equal({ controller: "news", action: "index" }, @routes.recognize_path(URI::RFC2396_PARSER.escape("こんにちは/世界").downcase, method: :get))
   end
 
   private
diff --git a/actionview/lib/action_view/helpers/url_helper.rb b/actionview/lib/action_view/helpers/url_helper.rb
index 70c5be9d112d7..a2ab335b8cfdc 100644
--- a/actionview/lib/action_view/helpers/url_helper.rb
+++ b/actionview/lib/action_view/helpers/url_helper.rb
@@ -556,14 +556,14 @@ def current_page?(options = nil, check_parameters: false, **options_as_kwargs)
 
         options ||= options_as_kwargs
         check_parameters ||= options.is_a?(Hash) && options.delete(:check_parameters)
-        url_string = URI::DEFAULT_PARSER.unescape(url_for(options)).force_encoding(Encoding::BINARY)
+        url_string = URI::RFC2396_PARSER.unescape(url_for(options)).force_encoding(Encoding::BINARY)
 
         # We ignore any extra parameters in the request_uri if the
         # submitted URL doesn't have any either. This lets the function
         # work with things like ?order=asc
         # the behavior can be disabled with check_parameters: true
         request_uri = url_string.index("?") || check_parameters ? request.fullpath : request.path
-        request_uri = URI::DEFAULT_PARSER.unescape(request_uri).force_encoding(Encoding::BINARY)
+        request_uri = URI::RFC2396_PARSER.unescape(request_uri).force_encoding(Encoding::BINARY)
 
         if %r{^\w+://}.match?(url_string)
           request_uri = +"#{request.protocol}#{request.host_with_port}#{request_uri}"
diff --git a/activerecord/lib/active_record/database_configurations/connection_url_resolver.rb b/activerecord/lib/active_record/database_configurations/connection_url_resolver.rb
index 6333e819f9f35..fe0315b0d2381 100644
--- a/activerecord/lib/active_record/database_configurations/connection_url_resolver.rb
+++ b/activerecord/lib/active_record/database_configurations/connection_url_resolver.rb
@@ -45,7 +45,7 @@ def to_hash
         attr_reader :uri
 
         def uri_parser
-          @uri_parser ||= URI::Parser.new
+          @uri_parser ||= URI::RFC2396_Parser.new
         end
 
         # Converts the query parameters of the URI into a hash.
diff --git a/activesupport/activesupport.gemspec b/activesupport/activesupport.gemspec
index 9f9bfc68af054..04856617f87a4 100644
--- a/activesupport/activesupport.gemspec
+++ b/activesupport/activesupport.gemspec
@@ -44,4 +44,5 @@ Gem::Specification.new do |s|
   s.add_dependency "bigdecimal"
   s.add_dependency "logger", ">= 1.4.2"
   s.add_dependency "securerandom", ">= 0.3"
+  s.add_dependency "uri", ">= 0.13.1"
 end
diff --git a/activesupport/lib/active_support/testing/strict_warnings.rb b/activesupport/lib/active_support/testing/strict_warnings.rb
index 83cd048a21f74..1d535b5558fd3 100644
--- a/activesupport/lib/active_support/testing/strict_warnings.rb
+++ b/activesupport/lib/active_support/testing/strict_warnings.rb
@@ -15,9 +15,6 @@ class WarningError < StandardError; end
       /Ignoring .*\.yml because it has expired/,
       /Failed to validate the schema cache because/,
 
-      # TODO: Can be removed if https://github.com/ruby/uri/issues/118 is addressed
-      /URI::RFC3986_PARSER/,
-
       # TODO: We need to decide what to do with this.
       /Status code :unprocessable_entity is deprecated/
     )
diff --git a/railties/lib/rails/info_controller.rb b/railties/lib/rails/info_controller.rb
index fec6a6d84a343..2279b133e57f0 100644
--- a/railties/lib/rails/info_controller.rb
+++ b/railties/lib/rails/info_controller.rb
@@ -20,7 +20,7 @@ def properties
 
   def routes
     if query = params[:query]
-      query = URI::DEFAULT_PARSER.escape query
+      query = URI::RFC2396_PARSER.escape query
 
       render json: {
         exact: matching_routes(query: query, exact_match: true),
@@ -61,7 +61,7 @@ def matching_routes(query:, exact_match:)
         match ||= (query === route_wrapper.verb)
 
         unless match
-          controller_action = URI::DEFAULT_PARSER.escape(route_wrapper.reqs)
+          controller_action = URI::RFC2396_PARSER.escape(route_wrapper.reqs)
           match = exact_match ? (query === controller_action) : controller_action.include?(query)
         end
 
diff --git a/railties/test/application/assets_test.rb b/railties/test/application/assets_test.rb
index 4e5e98859ec31..a8f6b1d5eff46 100644
--- a/railties/test/application/assets_test.rb
+++ b/railties/test/application/assets_test.rb
@@ -324,7 +324,7 @@ class User < ActiveRecord::Base; raise 'should not be reached'; end
       # Load app env
       app "development"
 
-      get "/assets/#{URI::DEFAULT_PARSER.escape(asset_path)}"
+      get "/assets/#{URI::RFC2396_PARSER.escape(asset_path)}"
       assert_match "not an image really", last_response.body
       assert_file_exists("#{app_path}/public/assets/#{asset_path}")
     end