From ea70c0ba65fd76c037c33ed77e1e1a40abbdb45a Mon Sep 17 00:00:00 2001
From: Alexander Menk <a.menk@imi.de>
Date: Wed, 18 Mar 2020 15:52:23 +0100
Subject: [PATCH] #26682 Disallow setting extension attributes as data array

---
 app/code/Magento/Quote/Model/ShippingMethodManagement.php | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/app/code/Magento/Quote/Model/ShippingMethodManagement.php b/app/code/Magento/Quote/Model/ShippingMethodManagement.php
index 73a2a43b2581f..202eeb765216b 100644
--- a/app/code/Magento/Quote/Model/ShippingMethodManagement.php
+++ b/app/code/Magento/Quote/Model/ShippingMethodManagement.php
@@ -309,7 +309,13 @@ private function getShippingMethods(Quote $quote, $address)
     {
         $output = [];
         $shippingAddress = $quote->getShippingAddress();
-        $shippingAddress->addData($this->extractAddressData($address));
+
+        $extractedAddressData = $this->extractAddressData($address);
+        if (array_key_exists('extension_attributes', $extractedAddressData)) {
+            unset($extractedAddressData['extension_attributes']);
+	    }
+        $shippingAddress->addData($extractedAddressData);
+
         $shippingAddress->setCollectShippingRates(true);
 
         $this->totalsCollector->collectAddressTotals($quote, $shippingAddress);