diff --git a/src/module-elasticsuite-catalog/Model/CategoryPermissions/Filter/Provider.php b/src/module-elasticsuite-catalog/Model/CategoryPermissions/Filter/Provider.php
new file mode 100644
index 000000000..238b2f286
--- /dev/null
+++ b/src/module-elasticsuite-catalog/Model/CategoryPermissions/Filter/Provider.php
@@ -0,0 +1,80 @@
+<?php
+/**
+ * DISCLAIMER
+ * Do not edit or add to this file if you wish to upgrade Smile ElasticSuite to newer
+ * versions in the future.
+ *
+ * @category  Smile
+ * @package   Smile\ElasticsuiteCatalog
+ * @author    Romain Ruaud <romain.ruaud@smile.fr>
+ * @copyright 2025 Smile
+ * @license   Open Software License ("OSL") v. 3.0
+ */
+namespace Smile\ElasticsuiteCatalog\Model\CategoryPermissions\Filter;
+
+use Smile\ElasticsuiteCore\Search\Request\Query\QueryFactory;
+use Smile\ElasticsuiteCore\Search\Request\QueryInterface;
+
+/**
+ * Query Provider for Catalog permissions
+ *
+ * @category Smile
+ * @package  Smile\ElasticsuiteCatalog
+ * @author   Romain Ruaud <romain.ruaud@smile.fr>
+ */
+class Provider
+{
+    /**
+     * @var \Smile\ElasticsuiteCore\Search\Request\Query\QueryFactory
+     */
+    private $queryFactory;
+
+    /**
+     * @param \Smile\ElasticsuiteCore\Search\Request\Query\QueryFactory $queryFactory Query Factory
+     */
+    public function __construct(QueryFactory $queryFactory)
+    {
+        $this->queryFactory = $queryFactory;
+    }
+
+    /**
+     * Build a clause to filter on products which are not available for the current customer group id.
+     * By default, the clause is a "NOT equal to -2" in legacy Magento.s
+     *
+     * @param int    $customerGroupId Customer Group Id
+     * @param int    $value           Permission value
+     * @param string $operator        Operator to use (default is mustNot because the legacy query is "is not denied")
+     *
+     * @return \Smile\ElasticsuiteCore\Search\Request\QueryInterface|null
+     */
+    public function getQueryFilter(int $customerGroupId, int $value, string $operator = 'mustNot') : ?QueryInterface
+    {
+        $query = $this->queryFactory->create(
+            QueryInterface::TYPE_NESTED,
+            [
+                'path'  => 'category_permissions',
+                'query' => $this->queryFactory->create(
+                    QueryInterface::TYPE_BOOL,
+                    [
+                        'must' => [
+                            $this->queryFactory->create(
+                                QueryInterface::TYPE_TERM,
+                                ['field' => 'category_permissions.customer_group_id', 'value' => $customerGroupId]
+                            ),
+                            $this->queryFactory->create(
+                                QueryInterface::TYPE_TERM,
+                                ['field' => 'category_permissions.permission', 'value' => $value]
+                            ),
+                        ],
+                    ]
+                ),
+            ]
+        );
+
+        if ('mustNot' === $operator) {
+            $query = $this->queryFactory->create(QueryInterface::TYPE_NOT, ['query' => $query]);
+        }
+
+        return $query;
+    }
+}
diff --git a/src/module-elasticsuite-catalog/Model/Product/Indexer/Fulltext/Datasource/CategoryPermissions.php b/src/module-elasticsuite-catalog/Model/Product/Indexer/Fulltext/Datasource/CategoryPermissions.php
new file mode 100644
index 000000000..ae6e406bf
--- /dev/null
+++ b/src/module-elasticsuite-catalog/Model/Product/Indexer/Fulltext/Datasource/CategoryPermissions.php
@@ -0,0 +1,115 @@
+<?php
+/**
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade to newer versions in the future.
+ *
+ * @category  Smile
+ * @package   Smile\ElasticsuiteCatalog
+ * @author    Romain Ruaud <romain.ruaud@smile.fr>
+ * @copyright 2025 Smile
+ * @license   Open Software License ("OSL") v. 3.0
+ */
+
+declare(strict_types = 1);
+
+namespace Smile\ElasticsuiteCatalog\Model\Product\Indexer\Fulltext\Datasource;
+
+use Magento\Framework\ObjectManagerInterface;
+use Smile\ElasticsuiteCore\Api\Index\DatasourceInterface;
+
+/**
+ * Category Permissions data source.
+ *
+ * @category  Smile
+ * @package   Smile\ElasticsuiteCatalog
+ * @author    Romain Ruaud <romain.ruaud@smile.fr>
+ */
+class CategoryPermissions implements DatasourceInterface
+{
+    /**
+     * @var \Magento\Framework\ObjectManagerInterface
+     */
+    private $objectManager;
+
+    /**
+     * @var \Magento\CatalogPermissions\Model\ResourceModel\Permission\Index|null|false
+     */
+    private $categoryPermissionsIndex;
+
+    /**
+     * @var null|boolean
+     */
+    private $isEnabled = null;
+
+    /**
+     * @param \Magento\Framework\ObjectManagerInterface $objectManager Object Manager
+     */
+    public function __construct(
+        ObjectManagerInterface $objectManager
+    ) {
+        $this->objectManager = $objectManager;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function addData($storeId, array $indexData)
+    {
+        if ($this->isEnabled() && $this->getPermissionsIndex() !== false) {
+            $permissionData = $this->getPermissionsIndex()->getIndexForProduct(array_keys($indexData), null, $storeId);
+
+            foreach ($permissionData as $permission) {
+                $indexData[(int) $permission['product_id']]['category_permissions'][] = [
+                    'customer_group_id' => (int) $permission['customer_group_id'],
+                    'permission'        => (int) $permission['grant_catalog_category_view'],
+                ];
+            }
+        }
+
+        return $indexData ?? [];
+    }
+
+    /**
+     * Fetch CategoryPermissions resource model, if the class exist.
+     *
+     * @return false|\Magento\CatalogPermissions\Model\ResourceModel\Permission\Index
+     */
+    private function getPermissionsIndex()
+    {
+        if (null === $this->categoryPermissionsIndex) {
+            $this->categoryPermissionsIndex = false;
+            try {
+                // Class will be missing if not using Adobe Commerce.
+                $this->categoryPermissionsIndex = $this->objectManager->get(
+                    \Magento\CatalogPermissions\Model\ResourceModel\Permission\Index::class
+                );
+            } catch (\Exception $exception) {
+                ; // Nothing to do, it's already kinda hacky to allow this to happen.
+            }
+        }
+
+        return $this->categoryPermissionsIndex;
+    }
+
+    /**
+     * Check if category permissions feature is enabled.
+     *
+     * @return bool
+     */
+    private function isEnabled()
+    {
+        if (null === $this->isEnabled) {
+            $this->isEnabled = false;
+            try {
+                // Class will be missing if not using Adobe Commerce.
+                $config = $this->objectManager->get(\Magento\CatalogPermissions\App\ConfigInterface::class);
+                $this->isEnabled = $config->isEnabled();
+            } catch (\Exception $exception) {
+                ; // Nothing to do, it's already kinda hacky to allow this to happen.
+            }
+        }
+
+        return $this->isEnabled;
+    }
+}
diff --git a/src/module-elasticsuite-catalog/Model/Product/Search/Request/Container/Filter/CategoryPermissions.php b/src/module-elasticsuite-catalog/Model/Product/Search/Request/Container/Filter/CategoryPermissions.php
new file mode 100644
index 000000000..efa3e8c4b
--- /dev/null
+++ b/src/module-elasticsuite-catalog/Model/Product/Search/Request/Container/Filter/CategoryPermissions.php
@@ -0,0 +1,109 @@
+<?php
+/**
+ * DISCLAIMER
+ *
+ * Do not edit or add to this file if you wish to upgrade Smile ElasticSuite to newer
+ * versions in the future.
+ *
+ * @category  Smile
+ * @package   Smile\ElasticSuiteCatalog
+ * @author    Romain Ruaud <romain.ruaud@smile.fr>
+ * @copyright 2025 Smile
+ * @license   Open Software License ("OSL") v. 3.0
+ */
+namespace Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter;
+
+use Smile\ElasticsuiteCore\Api\Search\Request\Container\FilterInterface;
+
+/**
+ * Category Permissions filter.
+ *
+ * @category Smile
+ * @package  Smile\ElasticsuiteCatalog
+ * @author   Romain Ruaud <romain.ruaud@smile.fr>
+ */
+class CategoryPermissions implements FilterInterface
+{
+    /**
+     * @var \Smile\ElasticsuiteCore\Search\Request\Query\QueryFactory
+     */
+    private $queryFactory;
+
+    /**
+     * @var \Magento\Customer\Model\Session
+     */
+    private $customerSession;
+
+    /**
+     * @var \Smile\ElasticsuiteCatalog\Model\CategoryPermissions\Filter\Provider
+     */
+    private $categoryPermissionsFilter;
+
+    /**
+     * @var \Magento\Framework\ObjectManagerInterface
+     */
+    private $objectManager;
+
+    /**
+     * @var null|boolean
+     */
+    private $isEnabled = null;
+
+    /**
+     * Search Blacklist filter constructor.
+     *
+     * @param \Smile\ElasticsuiteCore\Search\Request\Query\QueryFactory            $queryFactory              Query Factory
+     * @param \Smile\ElasticsuiteCatalog\Model\CategoryPermissions\Filter\Provider $categoryPermissionsFilter Query Filter for Permissions
+     * @param \Magento\Customer\Model\Session                                      $customerSession           Customer Session
+     * @param \Magento\Framework\ObjectManagerInterface                            $objectManager             Object Manager
+     */
+    public function __construct(
+        \Smile\ElasticsuiteCore\Search\Request\Query\QueryFactory $queryFactory,
+        \Smile\ElasticsuiteCatalog\Model\CategoryPermissions\Filter\Provider $categoryPermissionsFilter,
+        \Magento\Customer\Model\Session $customerSession,
+        \Magento\Framework\ObjectManagerInterface $objectManager
+    ) {
+        $this->queryFactory              = $queryFactory;
+        $this->categoryPermissionsFilter = $categoryPermissionsFilter;
+        $this->customerSession           = $customerSession;
+        $this->objectManager             = $objectManager;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public function getFilterQuery()
+    {
+        $query = null;
+
+        if ($this->isEnabled()) {
+            $query = $this->categoryPermissionsFilter->getQueryFilter(
+                $this->customerSession->getCustomerGroupId(),
+                -2 // Cannot use \Magento\CatalogPermissions\Model::PERMISSION_DENY because the class can be missing.
+            );
+        }
+
+        return $query;
+    }
+
+    /**
+     * Check if category permissions feature is enabled.
+     *
+     * @return bool
+     */
+    private function isEnabled()
+    {
+        if (null === $this->isEnabled) {
+            $this->isEnabled = false;
+            try {
+                // Class will be missing if not using Adobe Commerce.
+                $config = $this->objectManager->get(\Magento\CatalogPermissions\App\ConfigInterface::class);
+                $this->isEnabled = $config->isEnabled();
+            } catch (\Exception $exception) {
+                ; // Nothing to do, it's already kinda hacky to allow this to happen.
+            }
+        }
+
+        return $this->isEnabled;
+    }
+}
diff --git a/src/module-elasticsuite-catalog/Plugin/Search/RequestMapperPlugin.php b/src/module-elasticsuite-catalog/Plugin/Search/RequestMapperPlugin.php
index 6e7b3c012..07d29e2e1 100644
--- a/src/module-elasticsuite-catalog/Plugin/Search/RequestMapperPlugin.php
+++ b/src/module-elasticsuite-catalog/Plugin/Search/RequestMapperPlugin.php
@@ -193,6 +193,10 @@ public function afterGetFilters(
             }
         }
 
+        // Discard Category Permissions fields in all cases. They don't exist in the mapping and cannot be handled like this.
+        unset($result['category_permissions_field']);
+        unset($result['category_permissions_value']);
+
         return $result;
     }
 
diff --git a/src/module-elasticsuite-catalog/etc/di.xml b/src/module-elasticsuite-catalog/etc/di.xml
index 5c7698e8e..a0149ea2f 100644
--- a/src/module-elasticsuite-catalog/etc/di.xml
+++ b/src/module-elasticsuite-catalog/etc/di.xml
@@ -347,6 +347,7 @@
                     <item name="stock" xsi:type="object">Smile\ElasticsuiteCatalog\Model\Product\Indexer\Fulltext\Datasource\InventoryData</item>
                     <item name="searchPositions" xsi:type="object">Smile\ElasticsuiteCatalog\Model\Product\Indexer\Fulltext\Datasource\SearchPositionData</item>
                     <item name="ignoreOutOfStockPositions" xsi:type="object">Smile\ElasticsuiteCatalog\Model\Product\Indexer\Fulltext\Datasource\IgnoreOutOfStockPositionsData</item>
+                    <item name="categoryPermissions" xsi:type="object">Smile\ElasticsuiteCatalog\Model\Product\Indexer\Fulltext\Datasource\CategoryPermissions</item>
                 </item>
                 <item name="catalog_category" xsi:type="array">
                     <item name="attributes" xsi:type="object">Smile\ElasticsuiteCatalog\Model\Category\Indexer\Fulltext\Datasource\AttributeData</item>
@@ -402,6 +403,11 @@
             <argument name="customerSession" xsi:type="object">Magento\Customer\Model\Session\Proxy</argument>
         </arguments>
     </type>
+    <type name="Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\CategoryPermissions">
+        <arguments>
+            <argument name="customerSession" xsi:type="object">Magento\Customer\Model\Session\Proxy</argument>
+        </arguments>
+    </type>
 
     <!-- register new catalog EAV attributes -->
     <type name="Magento\Eav\Model\Entity\Setup\PropertyMapper\Composite">
diff --git a/src/module-elasticsuite-catalog/etc/elasticsuite_indices.xml b/src/module-elasticsuite-catalog/etc/elasticsuite_indices.xml
index 375b43b7e..ffb7b7949 100644
--- a/src/module-elasticsuite-catalog/etc/elasticsuite_indices.xml
+++ b/src/module-elasticsuite-catalog/etc/elasticsuite_indices.xml
@@ -71,6 +71,9 @@
                 <field name="search_query.position" type="integer" nestedPath="search_query" />
                 <field name="search_query.is_blacklisted" type="boolean" nestedPath="search_query" />
 
+                <!-- Static fields handled by the "categoryPermissions" datasource -->
+                <field name="category_permissions.customer_group_id" type="integer" nestedPath="category_permissions" />
+                <field name="category_permissions.permission" type="integer" nestedPath="category_permissions" />
             </mapping>
         </type>
     </index>
diff --git a/src/module-elasticsuite-catalog/etc/elasticsuite_search_request.xml b/src/module-elasticsuite-catalog/etc/elasticsuite_search_request.xml
index 07742adfe..c22eb84d1 100644
--- a/src/module-elasticsuite-catalog/etc/elasticsuite_search_request.xml
+++ b/src/module-elasticsuite-catalog/etc/elasticsuite_search_request.xml
@@ -23,6 +23,7 @@
             <filter name="stockFilter">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\Stock</filter>
             <filter name="visibleInSearch">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\VisibleInSearch</filter>
             <filter name="blacklistedProducts">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\SearchBlacklist</filter>
+            <filter name="categoryPermissions">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\CategoryPermissions</filter>
         </filters>
         <aggregations>
             <provider name="filterableAttributesProvider">searchFilterableAttributesProvider</provider>
@@ -36,6 +37,7 @@
             <filter name="stockFilter">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\Stock</filter>
             <filter name="visibleInSearch">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\VisibleInSearch</filter>
             <filter name="blacklistedProducts">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\SearchBlacklist</filter>
+            <filter name="categoryPermissions">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\CategoryPermissions</filter>
         </filters>
         <aggregations>
             <provider name="autocompleteAttributesProvider">autocompleteFilterableAttributesProvider</provider>
@@ -47,6 +49,7 @@
             <filter name="stockFilter">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\Stock</filter>
             <filter name="visibleInCatalog">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\VisibleInCatalog</filter>
             <filter name="currentCategory">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\CurrentCategory</filter>
+            <filter name="categoryPermissions">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\CategoryPermissions</filter>
         </filters>
         <aggregations>
             <provider name="filterableAttributesProvider">categoryFilterableAttributesProvider</provider>
@@ -61,6 +64,7 @@
         <filters>
             <filter name="stockFilter">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\Stock</filter>
             <filter name="visibleInCatalog">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\VisibleInCatalog</filter>
+            <filter name="categoryPermissions">Smile\ElasticsuiteCatalog\Model\Product\Search\Request\Container\Filter\CategoryPermissions</filter>
         </filters>
         <aggregations>
             <aggregation xsi:type="termBucket" name="attribute_set_id" field="attribute_set_id"/>