diff --git a/lib/Horde/Registry.php b/lib/Horde/Registry.php
index 75019016..aed061b7 100644
--- a/lib/Horde/Registry.php
+++ b/lib/Horde/Registry.php
@@ -522,10 +522,15 @@ public function __construct($session_flags = 0, array $args = [])
         /* Save arguments. */
         $this->_args = $args;
 
-        /* Setup injector. */
+        /* Setup injector. Only register the default bindings on an injector we
+         * created ourselves: registering them again on one handed over by a
+         * bootstrap shadows instances it already resolved (e.g. SessionLifecycle). */
+        $injectorProvided = isset($GLOBALS['injector']);
         $injector = $GLOBALS['injector'] ??= new Horde_Injector(new Horde_Injector_TopLevel());
 
-        (new \Horde\Core\DefaultInjectorBindings())->register($injector);
+        if (!$injectorProvided) {
+            (new \Horde\Core\DefaultInjectorBindings())->register($injector);
+        }
 
         $GLOBALS['registry'] = $this;
         $injector->setInstance(__CLASS__, $this);
diff --git a/src/DefaultInjectorBindings.php b/src/DefaultInjectorBindings.php
index 7774ad11..932abcb6 100644
--- a/src/DefaultInjectorBindings.php
+++ b/src/DefaultInjectorBindings.php
@@ -226,6 +226,7 @@ public function register(Injector $injector): void
             'Horde_Perms' => 'Horde_Core_Factory_Perms',
             'Horde_Perms_Base' => 'Horde_Core_Factory_Perms',
             'Horde_Queue_Storage' => 'Horde_Core_Factory_QueueStorage',
+            'Horde_Registry' => [Factory\HordeRegistryFactory::class, 'create'],
             'Horde_Routes_Mapper' => 'Horde_Core_Factory_Mapper',
             HordeRoutesMapper::class => 'Horde_Core_Factory_Mapper',
             'Horde_Routes_Matcher' => 'Horde_Core_Factory_Matcher',
diff --git a/src/Factory/HordeRegistryFactory.php b/src/Factory/HordeRegistryFactory.php
new file mode 100644
index 00000000..3001aa48
--- /dev/null
+++ b/src/Factory/HordeRegistryFactory.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Copyright 2026 Horde LLC (http://www.horde.org/)
+ *
+ * See the enclosed file LICENSE for license information (LGPL). If you
+ * did not receive this file, see http://www.horde.org/licenses/lgpl21.
+ *
+ * @category  Horde
+ * @copyright 2026 Horde LLC
+ * @license   http://www.horde.org/licenses/lgpl21 LGPL 2.1
+ * @package   Core
+ */
+
+namespace Horde\Core\Factory;
+
+use Horde\Injector\Injector;
+use Horde_Registry;
+
+class HordeRegistryFactory
+{
+    public function create(Injector $injector): Horde_Registry
+    {
+        $GLOBALS['injector'] ??= $injector;
+
+        return new Horde_Registry();
+    }
+}