diff --git a/vendor/magento/module-sales-rule/Model/Converter/ToDataModel.php b/vendor/magento/module-sales-rule/Model/Converter/ToDataModel.php
index 2db45d4d904cb..55c28d0442490 100644
--- a/vendor/magento/module-sales-rule/Model/Converter/ToDataModel.php
+++ b/vendor/magento/module-sales-rule/Model/Converter/ToDataModel.php
@@ -98,6 +98,8 @@ public function toDataModel(Rule $ruleModel)
     }
 
     /**
+     * Convert conditions from array to condition data model
+     *
      * @param RuleDataModel $dataModel
      * @param Rule $ruleModel
      * @return $this
@@ -116,6 +118,8 @@ protected function mapConditions(RuleDataModel $dataModel, Rule $ruleModel)
     }
 
     /**
+     * Convert action conditions from array to condition data model
+     *
      * @param RuleDataModel $dataModel
      * @param Rule $ruleModel
      * @return $this
@@ -134,6 +138,8 @@ protected function mapActionConditions(RuleDataModel $dataModel, Rule $ruleModel
     }
 
     /**
+     * Convert store labels from associative array to array of objects with store_id and store_label fields
+     *
      * @param RuleDataModel $dataModel
      * @return $this
      */
@@ -154,6 +160,8 @@ protected function mapStoreLabels(RuleDataModel $dataModel)
     }
 
     /**
+     * Convert coupon type ID to its string representation in data model
+     *
      * @param RuleDataModel $dataModel
      * @return $this
      */
@@ -194,6 +202,8 @@ private function convertExtensionAttributesToObject(array $data)
     }
 
     /**
+     * Convert rule model fields to data model fields
+     *
      * @param RuleDataModel $dataModel
      * @param Rule $ruleModel
      * @return $this
@@ -225,6 +235,11 @@ public function arrayToConditionDataModel(array $input)
                 case 'attribute':
                     $conditionDataModel->setAttributeName($value);
                     break;
+                case 'attribute_scope':
+                    $extensions = $conditionDataModel->getExtensionAttributes();
+                    $extensions->setAttributeScope($value);
+                    $conditionDataModel->setExtensionAttributes($extensions);
+                    break;
                 case 'operator':
                     $conditionDataModel->setOperator($value);
                     break;
@@ -235,10 +250,7 @@ public function arrayToConditionDataModel(array $input)
                     $conditionDataModel->setAggregatorType($value);
                     break;
                 case 'conditions':
-                    $conditions = [];
-                    foreach ($value as $condition) {
-                        $conditions[] = $this->arrayToConditionDataModel($condition);
-                    }
+                    $conditions = array_values(array_map($this->arrayToConditionDataModel(...), $value));
                     $conditionDataModel->setConditions($conditions);
                     break;
                 default:
diff --git a/vendor/magento/module-sales-rule/Model/Converter/ToModel.php b/vendor/magento/module-sales-rule/Model/Converter/ToModel.php
index 958d76b131682..85642c983ad20 100644
--- a/vendor/magento/module-sales-rule/Model/Converter/ToModel.php
+++ b/vendor/magento/module-sales-rule/Model/Converter/ToModel.php
@@ -5,9 +5,12 @@
  */
 namespace Magento\SalesRule\Model\Converter;
 
+use Magento\Framework\App\ObjectManager;
+use Magento\Framework\Exception\InputException;
 use Magento\SalesRule\Api\Data\RuleInterface;
 use Magento\SalesRule\Model\Data\Condition;
 use Magento\SalesRule\Model\Data\Rule as RuleDataModel;
+use Magento\SalesRule\Model\Data\Validator;
 use Magento\SalesRule\Model\Rule;
 
 class ToModel
@@ -24,16 +27,24 @@ class ToModel
      */
     protected $dataObjectProcessor;
 
+    /**
+     * @var Validator
+     */
+    private Validator $validator;
+
     /**
      * @param \Magento\SalesRule\Model\RuleFactory $ruleFactory
      * @param \Magento\Framework\Reflection\DataObjectProcessor $dataObjectProcessor
+     * @param Validator|null $validator
      */
     public function __construct(
         \Magento\SalesRule\Model\RuleFactory $ruleFactory,
-        \Magento\Framework\Reflection\DataObjectProcessor $dataObjectProcessor
+        \Magento\Framework\Reflection\DataObjectProcessor $dataObjectProcessor,
+        ?Validator $validator = null
     ) {
         $this->ruleFactory = $ruleFactory;
         $this->dataObjectProcessor = $dataObjectProcessor;
+        $this->validator = $validator ?? ObjectManager::getInstance()->get(Validator::class);
     }
 
     /**
@@ -150,6 +161,9 @@ public function dataModelToArray(Condition $condition, $key = 'conditions')
         $output['value'] = $condition->getValue();
         $output['attribute'] = $condition->getAttributeName();
         $output['operator'] = $condition->getOperator();
+        if ($condition->getExtensionAttributes()?->getAttributeScope()) {
+            $output['attribute_scope'] = $condition->getExtensionAttributes()->getAttributeScope();
+        }
 
         if ($condition->getAggregatorType()) {
             $output['aggregator'] = $condition->getAggregatorType();
@@ -170,7 +184,7 @@ public function dataModelToArray(Condition $condition, $key = 'conditions')
      * @param RuleDataModel $dataModel
      * @return $this|Rule
      * @throws \Magento\Framework\Exception\NoSuchEntityException
-     * @throws \Magento\Framework\Exception\InputException
+     * @throws InputException
      */
     public function toModel(RuleDataModel $dataModel)
     {
@@ -204,20 +218,22 @@ public function toModel(RuleDataModel $dataModel)
         $mergedData = array_merge($modelData, $data);
 
         $validateResult = $ruleModel->validateData(new \Magento\Framework\DataObject($mergedData));
-        if ($validateResult !== true) {
-            $text = '';
-            /** @var \Magento\Framework\Phrase $errorMessage */
-            foreach ($validateResult as $errorMessage) {
-                $text .= $errorMessage->getText();
-                $text .= '; ';
-            }
-            throw new \Magento\Framework\Exception\InputException(new \Magento\Framework\Phrase($text));
-        }
+        $validationErrors = is_array($validateResult) ? $validateResult : [];
 
         $ruleModel->setData($mergedData);
 
         $this->mapFields($ruleModel, $dataModel);
 
+        if (!$this->validator->isValid($dataModel)) {
+            $validationErrors = array_merge($validationErrors, $this->validator->getMessages());
+        }
+        
+        if ($validationErrors) {
+            $exception = new InputException();
+            array_walk($validationErrors, $exception->addError(...));
+            throw $exception;
+        }
+
         return $ruleModel;
     }
 
diff --git a/vendor/magento/module-sales-rule/Model/Data/Condition/Validator.php b/vendor/magento/module-sales-rule/Model/Data/Condition/Validator.php
new file mode 100644
index 0000000000000..176fae8c705c9
--- /dev/null
+++ b/vendor/magento/module-sales-rule/Model/Data/Condition/Validator.php
@@ -0,0 +1,57 @@
+<?php
+/**
+ * Copyright 2026 Adobe
+ * All Rights Reserved.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\SalesRule\Model\Data\Condition;
+
+use InvalidArgumentException;
+use Magento\Framework\Validator\AbstractValidator;
+use Magento\SalesRule\Model\Data\Condition;
+use Magento\SalesRule\Model\Data\Rule;
+
+class Validator extends AbstractValidator
+{
+    /**
+     * @inheritDoc
+     */
+    public function isValid($value)
+    {
+        $this->_clearMessages();
+        if (!$value instanceof Rule) {
+            throw new InvalidArgumentException('Expected instance of ' . Rule::class);
+        }
+        if ($value->getCondition()) {
+            $this->validate($value->getCondition());
+        }
+        if ($value->getActionCondition()) {
+            $this->validate($value->getActionCondition());
+        }
+        return empty($this->getMessages());
+    }
+
+    /**
+     * Validate condition attributes
+     *
+     * @param Condition $condition
+     * @return void
+     */
+    private function validate(Condition $condition): void
+    {
+        $scope = $condition->getExtensionAttributes()?->getAttributeScope();
+        if ($scope && !in_array($scope, ['parent', 'children'], true)) {
+            $this->_addMessages([__(
+                'Invalid value of "%value" provided for the %fieldName field.',
+                ['fieldName' => 'attribute_scope', 'value' => $scope]
+            )]);
+        }
+        if ($condition->getConditions()) {
+            foreach ($condition->getConditions() as $condition) {
+                $this->validate($condition);
+            }
+        }
+    }
+}
diff --git a/vendor/magento/module-sales-rule/Model/Data/Validator.php b/vendor/magento/module-sales-rule/Model/Data/Validator.php
new file mode 100644
index 0000000000000..91c6c8dac7b83
--- /dev/null
+++ b/vendor/magento/module-sales-rule/Model/Data/Validator.php
@@ -0,0 +1,38 @@
+<?php
+/**
+ * Copyright 2026 Adobe
+ * All Rights Reserved.
+ */
+
+declare(strict_types=1);
+
+namespace Magento\SalesRule\Model\Data;
+
+use Magento\Framework\Validator\AbstractValidator;
+use Magento\Framework\Validator\ValidatorInterface;
+
+class Validator extends AbstractValidator
+{
+    /**
+     * @param array $validators
+     */
+    public function __construct(
+        private readonly array $validators = []
+    ) {
+        array_map(fn (ValidatorInterface $validator) => $validator, $validators);
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function isValid($value)
+    {
+        $this->_clearMessages();
+        foreach ($this->validators as $validator) {
+            if (!$validator->isValid($value)) {
+                $this->_addMessages($validator->getMessages());
+            }
+        }
+        return empty($this->getMessages());
+    }
+}
diff --git a/vendor/magento/module-sales-rule/etc/di.xml b/vendor/magento/module-sales-rule/etc/di.xml
index cd841b36338e4..8500e6d358828 100644
--- a/vendor/magento/module-sales-rule/etc/di.xml
+++ b/vendor/magento/module-sales-rule/etc/di.xml
@@ -212,4 +212,11 @@
         </arguments>
     </type>
     <type name="Magento\SalesRule\Model\Rule\Action\Discount\ExistingDiscountRuleCollector" shared="true" />
+    <type name="Magento\SalesRule\Model\Data\Validator">
+        <arguments>
+            <argument name="validators" xsi:type="array">
+                <item name="condition" xsi:type="object">Magento\SalesRule\Model\Data\Condition\Validator</item>
+            </argument>
+        </arguments>
+    </type>
 </config>
diff --git a/vendor/magento/module-sales-rule/etc/extension_attributes.xml b/vendor/magento/module-sales-rule/etc/extension_attributes.xml
index 8cdf0fd7cd39c..d90c0d6d1ec42 100644
--- a/vendor/magento/module-sales-rule/etc/extension_attributes.xml
+++ b/vendor/magento/module-sales-rule/etc/extension_attributes.xml
@@ -15,4 +15,7 @@
     <extension_attributes for="Magento\Catalog\Api\Data\ProductInterface">
         <attribute code="discounts" type="Magento\SalesRule\Api\Data\RuleDiscountInterface[]" />
     </extension_attributes>
+    <extension_attributes for="Magento\SalesRule\Api\Data\ConditionInterface">
+        <attribute code="attribute_scope" type="string" />
+    </extension_attributes>
 </config>