diff --git a/config/sidebar.php b/config/sidebar.php
index 79e4ee6..afd9826 100644
--- a/config/sidebar.php
+++ b/config/sidebar.php
@@ -4,9 +4,12 @@ declare(strict_types=1);
 
 /*
  * Définition de la sidebar (sections + items) — navigation GLOBALE uniquement.
- * Filtrée par SidebarFilter : `module` (route ajoutée à disabledRoutes si module inactif),
- * `roles` (section ou item masqué si l'utilisateur n'a aucun des rôles listés ; gate minimal,
- * le RBAC fin par permission arrive en #1.2).
+ * Filtrée par SidebarFilter :
+ *   - `module`     : route ajoutée à disabledRoutes si module inactif ;
+ *   - `roles`      : section ou item masqué si l'utilisateur n'a aucun des rôles listés (gate minimal) ;
+ *   - `permission` : section ou item masqué si la permission effective absente (RBAC fin —
+ *                    `User::getEffectivePermissions()` ; ROLE_ADMIN bypasse via le voter, mais la
+ *                    sidebar évalue les permissions effectives réelles — combiner avec `roles` au besoin).
  * Les items contextuels (Kanban/Groupes/Archives), feature-flag (Documents, Mail) et user-flag
  * (Mes absences) restent rendus côté layout, hors de cet endpoint.
  * Les labels sont des clés i18n (sidebar.<domaine>.<item>).
@@ -28,7 +31,7 @@ return [
         'roles' => ['ROLE_ADMIN'],
         'items' => [
             ['label' => 'sidebar.admin.teamAbsences', 'to' => '/team-absences', 'icon' => 'mdi:calendar-account-outline'],
-            ['label' => 'sidebar.admin.administration', 'to' => '/admin', 'icon' => 'mdi:cog-outline'],
+            ['label' => 'sidebar.admin.administration', 'to' => '/admin', 'icon' => 'mdi:cog-outline', 'permission' => 'core.users.view'],
         ],
     ],
 ];
diff --git a/src/Shared/Domain/Sidebar/SidebarFilter.php b/src/Shared/Domain/Sidebar/SidebarFilter.php
index e740afa..e39f8c4 100644
--- a/src/Shared/Domain/Sidebar/SidebarFilter.php
+++ b/src/Shared/Domain/Sidebar/SidebarFilter.php
@@ -7,13 +7,14 @@ namespace App\Shared\Domain\Sidebar;
 final class SidebarFilter
 {
     /**
-     * @param list<array{label:string, icon:string, roles?:list<string>, items: list<array{label:string, to:string, icon:string, module?:string, roles?:list<string>}>}> $sections
-     * @param list<string>                                                                                                                                               $activeModuleIds
-     * @param list<string>                                                                                                                                               $activeRoles
+     * @param list<array{label:string, icon:string, roles?:list<string>, permission?:string, items: list<array{label:string, to:string, icon:string, module?:string, roles?:list<string>, permission?:string}>}> $sections
+     * @param list<string>                                                                                                                                                                                       $activeModuleIds
+     * @param list<string>                                                                                                                                                                                       $activeRoles
+     * @param list<string>                                                                                                                                                                                       $activePermissions
      *
      * @return array{sections: list<array{label:string, icon:string, items: list<array{label:string, to:string, icon:string}>}>, disabledRoutes: list<string>}
      */
-    public static function filter(array $sections, array $activeModuleIds, array $activeRoles = []): array
+    public static function filter(array $sections, array $activeModuleIds, array $activeRoles = [], array $activePermissions = []): array
     {
         $outSections    = [];
         $disabledRoutes = [];
@@ -24,6 +25,11 @@ final class SidebarFilter
                 continue;
             }
 
+            // Gate de permission au niveau section (RBAC fin).
+            if (!self::permissionSatisfied($section['permission'] ?? null, $activePermissions)) {
+                continue;
+            }
+
             $items = [];
             foreach ($section['items'] as $item) {
                 // Gate de rôle au niveau item.
@@ -31,6 +37,11 @@ final class SidebarFilter
                     continue;
                 }
 
+                // Gate de permission au niveau item (RBAC fin).
+                if (!self::permissionSatisfied($item['permission'] ?? null, $activePermissions)) {
+                    continue;
+                }
+
                 // Filtrage par module actif (pilote la redirection front via disabledRoutes).
                 $module = $item['module'] ?? null;
                 if (null !== $module && !in_array($module, $activeModuleIds, true)) {
@@ -68,4 +79,16 @@ final class SidebarFilter
 
         return false;
     }
+
+    /**
+     * @param list<string> $activePermissions
+     */
+    private static function permissionSatisfied(?string $required, array $activePermissions): bool
+    {
+        if (null === $required || '' === $required) {
+            return true;
+        }
+
+        return in_array($required, $activePermissions, true);
+    }
 }
diff --git a/src/Shared/Infrastructure/ApiPlatform/State/SidebarProvider.php b/src/Shared/Infrastructure/ApiPlatform/State/SidebarProvider.php
index ddcf48c..8f7ee43 100644
--- a/src/Shared/Infrastructure/ApiPlatform/State/SidebarProvider.php
+++ b/src/Shared/Infrastructure/ApiPlatform/State/SidebarProvider.php
@@ -6,6 +6,7 @@ namespace App\Shared\Infrastructure\ApiPlatform\State;
 
 use ApiPlatform\Metadata\Operation;
 use ApiPlatform\State\ProviderInterface;
+use App\Shared\Domain\Contract\UserInterface;
 use App\Shared\Domain\Module\ModuleRegistry;
 use App\Shared\Domain\Sidebar\SidebarFilter;
 use App\Shared\Infrastructure\ApiPlatform\Resource\SidebarResource;
@@ -31,7 +32,15 @@ final readonly class SidebarProvider implements ProviderInterface
         $user  = $this->security->getUser();
         $roles = null !== $user ? $user->getRoles() : [];
 
-        $filtered = SidebarFilter::filter($sidebar, ModuleRegistry::ids($moduleClasses), array_values($roles));
+        // RBAC fin : permissions effectives du contrat. ROLE_ADMIN bypasse tout (Décision 1) :
+        // on lui injecte le catalogue complet des permissions déclarées pour satisfaire les gates.
+        if (in_array('ROLE_ADMIN', $roles, true)) {
+            $permissions = array_column(ModuleRegistry::permissions($moduleClasses), 'code');
+        } else {
+            $permissions = $user instanceof UserInterface ? $user->getEffectivePermissions() : [];
+        }
+
+        $filtered = SidebarFilter::filter($sidebar, ModuleRegistry::ids($moduleClasses), array_values($roles), $permissions);
 
         $dto                 = new SidebarResource();
         $dto->sections       = $filtered['sections'];
diff --git a/tests/Unit/Shared/Sidebar/SidebarFilterTest.php b/tests/Unit/Shared/Sidebar/SidebarFilterTest.php
index ac9315c..939c1f1 100644
--- a/tests/Unit/Shared/Sidebar/SidebarFilterTest.php
+++ b/tests/Unit/Shared/Sidebar/SidebarFilterTest.php
@@ -103,4 +103,28 @@ final class SidebarFilterTest extends TestCase
         self::assertSame('/x', $result['sections'][0]['items'][0]['to']);
         self::assertArrayNotHasKey('roles', $result['sections'][0]['items'][0]);
     }
+
+    public function testItemHiddenWhenPermissionMissing(): void
+    {
+        $sections = [[
+            'label' => 's', 'icon' => 'i',
+            'items' => [
+                ['label' => 'a', 'to' => '/a', 'icon' => 'i', 'permission' => 'core.users.view'],
+                ['label' => 'b', 'to' => '/b', 'icon' => 'i'],
+            ],
+        ]];
+        $out = SidebarFilter::filter($sections, [], [], []);
+        self::assertCount(1, $out['sections'][0]['items']);
+        self::assertSame('/b', $out['sections'][0]['items'][0]['to']);
+    }
+
+    public function testItemVisibleWhenPermissionGranted(): void
+    {
+        $sections = [[
+            'label' => 's', 'icon' => 'i',
+            'items' => [['label' => 'a', 'to' => '/a', 'icon' => 'i', 'permission' => 'core.users.view']],
+        ]];
+        $out = SidebarFilter::filter($sections, [], [], ['core.users.view']);
+        self::assertCount(1, $out['sections'][0]['items']);
+    }
 }