diff --git a/app/code/Magento/ConfigurableProduct/Model/Product/Type/Configurable.php b/app/code/Magento/ConfigurableProduct/Model/Product/Type/Configurable.php
index e98f546943ff8..803517a5c7909 100644
--- a/app/code/Magento/ConfigurableProduct/Model/Product/Type/Configurable.php
+++ b/app/code/Magento/ConfigurableProduct/Model/Product/Type/Configurable.php
@@ -10,6 +10,7 @@
 use Magento\Catalog\Api\ProductRepositoryInterface;
 use Magento\Catalog\Model\Config;
 use Magento\Catalog\Model\Product;
+use Magento\Catalog\Model\Product\Gallery\ReadHandler as GalleryReadHandler;
 use Magento\CatalogInventory\Api\StockRegistryInterface;
 use Magento\CatalogInventory\Model\Stock\Status;
 use Magento\ConfigurableProduct\Model\Product\Type\Collection\SalableProcessor;
@@ -18,7 +19,6 @@
 use Magento\Eav\Model\Entity\Attribute\ScopedAttributeInterface;
 use Magento\Framework\App\ObjectManager;
 use Magento\Framework\EntityManager\MetadataPool;
-use Magento\Catalog\Model\Product\Gallery\ReadHandler as GalleryReadHandler;
 
 /**
  * Configurable product type implementation
@@ -484,8 +484,11 @@ public function getConfigurableAttributes($product)
      */
     protected function hasCacheData($configurableAttributes)
     {
-        $configurableAttributes = $configurableAttributes ?: unserialize($configurableAttributes);
-        if (is_array($configurableAttributes) && count($configurableAttributes)) {
+        if ($configurableAttributes) {
+            $configurableAttributes = unserialize($configurableAttributes);
+        }
+        $isTraversable = (is_array($configurableAttributes) || $configurableAttributes instanceof \Traversable);
+        if ($isTraversable && count($configurableAttributes)) {
             foreach ($configurableAttributes as $attribute) {
                 /** @var \Magento\ConfigurableProduct\Model\Product\Type\Configurable\Attribute $attribute */
                 if ($attribute->getData('options')) {