diff --git a/vendor/magento/module-quote-graph-ql/Model/Cart/CreateBuyRequest.php b/vendor/magento/module-quote-graph-ql/Model/Cart/CreateBuyRequest.php
index e15b7324ce2..7fdce5245b4 100644
--- a/vendor/magento/module-quote-graph-ql/Model/Cart/CreateBuyRequest.php
+++ b/vendor/magento/module-quote-graph-ql/Model/Cart/CreateBuyRequest.php
@@ -20,13 +20,21 @@ class CreateBuyRequest
      */
     private $dataObjectFactory;

+    /**
+     * @var CreateBuyRequestDataProviderInterface[]
+     */
+    private $providers;
+
     /**
      * @param DataObjectFactory $dataObjectFactory
+     * @param array $providers
      */
     public function __construct(
-        DataObjectFactory $dataObjectFactory
+        DataObjectFactory $dataObjectFactory,
+        array $providers = []
     ) {
         $this->dataObjectFactory = $dataObjectFactory;
+        $this->providers = $providers;
     }

     /**
@@ -39,21 +47,30 @@ class CreateBuyRequest
     public function execute(float $qty, array $customizableOptionsData): DataObject
     {
         $customizableOptions = [];
+        $enteredOptions = [];
         foreach ($customizableOptionsData as $customizableOption) {
             if (isset($customizableOption['value_string'])) {
-                $customizableOptions[$customizableOption['id']] = $this->convertCustomOptionValue(
-                    $customizableOption['value_string']
-                );
+                if (!is_numeric($customizableOption['id'])) {
+                    $enteredOptions[$customizableOption['id']] = $customizableOption['value_string'];
+                } else {
+                    $customizableOptions[$customizableOption['id']] = $this->convertCustomOptionValue(
+                        $customizableOption['value_string']
+                    );
+                }
             }
         }

-        $dataArray = [
-            'data' => [
+        $requestData = [
+            [
                 'qty' => $qty,
-                'options' => $customizableOptions,
-            ],
+                'options' => $customizableOptions
+            ]
         ];
-        return $this->dataObjectFactory->create($dataArray);
+        foreach ($this->providers as $provider) {
+            $requestData[] = $provider->execute($enteredOptions);
+        }
+
+        return $this->dataObjectFactory->create(['data' => array_merge([], ...$requestData)]);
     }

     /**
diff --git a/vendor/magento/module-quote-graph-ql/Model/Cart/CreateBuyRequestDataProviderInterface.php b/vendor/magento/module-quote-graph-ql/Model/Cart/CreateBuyRequestDataProviderInterface.php
new file mode 100644
index 00000000000..af52c2869e9
--- /dev/null
+++ b/vendor/magento/module-quote-graph-ql/Model/Cart/CreateBuyRequestDataProviderInterface.php
@@ -0,0 +1,19 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\QuoteGraphQl\Model\Cart;
+
+interface CreateBuyRequestDataProviderInterface
+{
+    /**
+     * Create buy request data that can be used for working with cart items
+     *
+     * @param array $cartItemData
+     * @return array
+     */
+    public function execute(array $cartItemData): array;
+}
diff --git a/vendor/magento/module-quote-graph-ql/Model/CartItem/CartItemsUidArgsProcessor.php b/vendor/magento/module-quote-graph-ql/Model/CartItem/CartItemsUidArgsProcessor.php
index 85e744c026c..b0d68aa6343 100644
--- a/vendor/magento/module-quote-graph-ql/Model/CartItem/CartItemsUidArgsProcessor.php
+++ b/vendor/magento/module-quote-graph-ql/Model/CartItem/CartItemsUidArgsProcessor.php
@@ -10,6 +10,7 @@ namespace Magento\QuoteGraphQl\Model\CartItem;
 use Magento\Framework\GraphQl\Exception\GraphQlInputException;
 use Magento\Framework\GraphQl\Query\Resolver\ArgumentsProcessorInterface;
 use Magento\Framework\GraphQl\Query\Uid;
+use Magento\Framework\App\ObjectManager;

 /**
  * Category UID processor class for category uid and category id arguments
@@ -23,18 +24,26 @@ class CartItemsUidArgsProcessor implements ArgumentsProcessorInterface
     /** @var Uid */
     private $uidEncoder;

+    /**
+     * @var CustomizableOptionUidArgsProcessor
+     */
+    private $optionUidArgsProcessor;
+
     /**
      * @param Uid $uidEncoder
+     * @param CustomizableOptionUidArgsProcessor|null $optionUidArgsProcessor
      */
-    public function __construct(Uid $uidEncoder)
+    public function __construct(Uid $uidEncoder, ?CustomizableOptionUidArgsProcessor $optionUidArgsProcessor = null)
     {
         $this->uidEncoder = $uidEncoder;
+        $this->optionUidArgsProcessor =
+            $optionUidArgsProcessor ?: ObjectManager::getInstance()->get(CustomizableOptionUidArgsProcessor::class);
     }

     /**
      * Process the updateCartItems arguments for cart uids
      *
-     * @param string $fieldName,
+     * @param string $fieldName
      * @param array $args
      * @return array
      * @throws GraphQlInputException
@@ -58,6 +67,10 @@ class CartItemsUidArgsProcessor implements ArgumentsProcessorInterface
                     $args[$filterKey]['cart_items'][$key][self::ID] = $this->uidEncoder->decode((string)$uidFilter);
                     unset($args[$filterKey]['cart_items'][$key][self::UID]);
                 }
+                if (!empty($cartItem['customizable_options'])) {
+                    $args[$filterKey]['cart_items'][$key]['customizable_options'] =
+                        $this->optionUidArgsProcessor->process($fieldName, $cartItem['customizable_options']);
+                }
             }
         }
         return $args;
diff --git a/vendor/magento/module-quote-graph-ql/Model/CartItem/CustomizableOptionUidArgsProcessor.php b/vendor/magento/module-quote-graph-ql/Model/CartItem/CustomizableOptionUidArgsProcessor.php
new file mode 100644
index 00000000000..278239bba54
--- /dev/null
+++ b/vendor/magento/module-quote-graph-ql/Model/CartItem/CustomizableOptionUidArgsProcessor.php
@@ -0,0 +1,64 @@
+<?php
+/**
+ * Copyright © Magento, Inc. All rights reserved.
+ * See COPYING.txt for license details.
+ */
+declare(strict_types=1);
+
+namespace Magento\QuoteGraphQl\Model\CartItem;
+
+use Magento\Framework\GraphQl\Exception\GraphQlInputException;
+use Magento\Framework\GraphQl\Query\Resolver\ArgumentsProcessorInterface;
+use Magento\Framework\GraphQl\Query\Uid;
+
+/**
+ * Category UID processor class for category uid and category id arguments
+ */
+class CustomizableOptionUidArgsProcessor implements ArgumentsProcessorInterface
+{
+    private const ID = 'id';
+
+    private const UID = 'uid';
+
+    /** @var Uid */
+    private $uidEncoder;
+
+    /**
+     * @param Uid $uidEncoder
+     */
+    public function __construct(Uid $uidEncoder)
+    {
+        $this->uidEncoder = $uidEncoder;
+    }
+
+    /**
+     * Process the customizable options for updateCartItems arguments for uids
+     *
+     * @param string $fieldName
+     * @param array $customizableOptions
+     * @return array
+     * @throws GraphQlInputException
+     */
+    public function process(string $fieldName, array $customizableOptions): array
+    {
+        foreach ($customizableOptions as $key => $option) {
+            $idFilter = $option[self::ID] ?? [];
+            $uidFilter = $option[self::UID] ?? [];
+
+            if (!empty($idFilter)
+                && !empty($uidFilter)
+                && $fieldName === 'updateCartItems') {
+                throw new GraphQlInputException(
+                    __(
+                        '`%1` and `%2` can\'t be used for CustomizableOptionInput object at the same time.',
+                        [self::ID, self::UID]
+                    )
+                );
+            } elseif (!empty($uidFilter)) {
+                $customizableOptions[$key][self::ID] = $this->uidEncoder->decode((string)$uidFilter);
+                unset($customizableOptions[$key][self::UID]);
+            }
+        }
+        return $customizableOptions;
+    }
+}
diff --git a/vendor/magento/module-quote-graph-ql/etc/schema.graphqls b/vendor/magento/module-quote-graph-ql/etc/schema.graphqls
index 1dc66531fba..feb531f107b 100644
--- a/vendor/magento/module-quote-graph-ql/etc/schema.graphqls
+++ b/vendor/magento/module-quote-graph-ql/etc/schema.graphqls
@@ -62,7 +62,8 @@ input CartItemInput @doc(description: "Defines an item to be added to the cart."
 }

 input CustomizableOptionInput @doc(description: "Defines a customizable option.") {
-    id: Int @doc(description: "The customizable option ID of the product.")
+    uid: ID @doc(description: "The unique ID for a `CartItemInterface` object.")
+    id: Int @deprecated(reason: "Use `uid` instead.") @doc(description: "The customizable option ID of the product.")
     value_string: String! @doc(description: "The string value of the option.")
 }