diff --git a/core/includes/menu.inc b/core/includes/menu.inc
index 0b59cfe..ca116de 100644
--- a/core/includes/menu.inc
+++ b/core/includes/menu.inc
@@ -8,6 +8,7 @@
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Cache\CacheBackendInterface;
 use Drupal\Core\Language\Language;
+use Drupal\Core\Routing\RequestHelper;
 use Drupal\Core\Template\Attribute;
 use Drupal\menu_link\Entity\MenuLink;
 use Drupal\menu_link\MenuLinkStorageController;
@@ -969,7 +970,7 @@ function _menu_link_translate(&$item, $translate = FALSE) {
  *   If the system path in $href does not match the $route.
  */
 function menu_item_route_access(Route $route, $href, &$map) {
-  $request = Request::create('/' . $href);
+  $request = RequestHelper::duplicate(\Drupal::request(), '/' . $href);
   $request->attributes->set('_system_path', $href);
   // Attempt to match this path to provide a fully built request to the
   // access checker.
diff --git a/core/lib/Drupal/Core/Access/AccessManager.php b/core/lib/Drupal/Core/Access/AccessManager.php
index a3b6191..5e935e0 100644
--- a/core/lib/Drupal/Core/Access/AccessManager.php
+++ b/core/lib/Drupal/Core/Access/AccessManager.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\Access;
 
 use Drupal\Core\ParamConverter\ParamConverterManager;
+use Drupal\Core\Routing\RequestHelper;
 use Drupal\Core\Routing\RouteProviderInterface;
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Symfony\Component\Routing\RouteCollection;
@@ -191,7 +192,7 @@ public function checkNamedRoute($route_name, array $parameters = array(), Reques
       $route = $this->routeProvider->getRouteByName($route_name, $parameters);
       if (empty($route_request)) {
         // Create a request and copy the account from the current request.
-        $route_request = Request::create($this->urlGenerator->generate($route_name, $parameters));
+        $route_request = RequestHelper::duplicate($this->request, $this->urlGenerator->generate($route_name, $parameters));
         $defaults = $parameters;
         $defaults['_account'] = $this->request->attributes->get('_account');
         $defaults[RouteObjectInterface::ROUTE_OBJECT] = $route;
diff --git a/core/lib/Drupal/Core/Routing/RequestHelper.php b/core/lib/Drupal/Core/Routing/RequestHelper.php
new file mode 100644
index 0000000..6b75040
--- /dev/null
+++ b/core/lib/Drupal/Core/Routing/RequestHelper.php
@@ -0,0 +1,127 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\Core\Routing\RequestHelper.
+ */
+
+namespace Drupal\Core\Routing;
+
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Provides some helper methods for dealing with the request.
+ */
+class RequestHelper {
+
+  /**
+   * Duplicates a request for another path.
+   *
+   * This method does basically the same as Request::create() but keeping all
+   * the previous variables to speed it up.
+   *
+   * @param \Symfony\Component\HttpFoundation\Request $original_request
+   *   The original request object to clone.
+   * @param string $uri
+   *   The URI.
+   * @param string $method
+   *   The HTTP method.
+   * @param array $parameters
+   *   The query (GET) or request (POST) parameters.
+   * @param array $query
+   *   The GET parameters.
+   * @param array $request
+   *   The POST parameters.
+   * @param array $attributes
+   *   The request attributes (parameters parsed from the PATH_INFO, ...).
+   * @param array $cookies
+   *   The COOKIE parameters.
+   * @param array $files
+   *   The FILES parameters.
+   * @param array $server
+   *   The SERVER parameters.
+   *
+   * @return \Symfony\Component\HttpFoundation\Request
+   *   The cloned request instance.
+   *
+   * @see \Symfony\Component\HttpFoundation\Request::create()
+   * @see \Symfony\Component\HttpFoundation\Request::duplicate()
+   */
+  public static function duplicate(Request $original_request, $uri, $method = 'GET', $parameters = array(), array $query = NULL, array $request = NULL, array $attributes = NULL, array $cookies = NULL, array $files = NULL, array $server = NULL) {
+    $request_clone = $original_request->duplicate($query, $request, $attributes, $cookies, $files, $server);
+
+    $server = array();
+
+    $server['PATH_INFO'] = '';
+    $server['REQUEST_METHOD'] = strtoupper($method);
+
+    $components = parse_url($uri);
+    if (isset($components['host'])) {
+      $server['SERVER_NAME'] = $components['host'];
+      $server['HTTP_HOST'] = $components['host'];
+    }
+
+    if (isset($components['scheme'])) {
+      if ('https' === $components['scheme']) {
+        $server['HTTPS'] = 'on';
+        $server['SERVER_PORT'] = 443;
+      }
+      else {
+        unset($server['HTTPS']);
+        $server['SERVER_PORT'] = 80;
+      }
+    }
+
+    if (isset($components['port'])) {
+      $server['SERVER_PORT'] = $components['port'];
+      $server['HTTP_HOST'] = $server['HTTP_HOST'] . ':' . $components['port'];
+    }
+
+    if (isset($components['user'])) {
+      $server['PHP_AUTH_USER'] = $components['user'];
+    }
+
+    if (isset($components['pass'])) {
+      $server['PHP_AUTH_PW'] = $components['pass'];
+    }
+
+    if (!isset($components['path'])) {
+      $components['path'] = '/';
+    }
+
+    switch (strtoupper($method)) {
+      case 'POST':
+      case 'PUT':
+      case 'DELETE':
+        if (!isset($server['CONTENT_TYPE'])) {
+          $server['CONTENT_TYPE'] = 'application/x-www-form-urlencoded';
+        }
+      case 'PATCH':
+        $request = $parameters;
+        $query = array();
+        break;
+      default:
+        $request = array();
+        $query = $parameters;
+        break;
+    }
+
+    if (isset($components['query'])) {
+      parse_str(html_entity_decode($components['query']), $query_string);
+      $query = array_replace($query_string, $query);
+    }
+    $query_string = http_build_query($query, '', '&');
+
+    // Prepend a ? if there is a query string.
+    $query_string = $query_string === '' ?:  '?' . $query_string;
+    $server['REQUEST_URI'] = $components['path'] . $query_string;
+    $server['QUERY_STRING'] = $query_string;
+    $request_clone->server->add($server);
+
+    $request_clone->request->add($request);
+    $request_clone->query->add($query);
+
+    return $request_clone;
+  }
+
+}