diff --git a/app/Http/Middleware/DangerZone.php b/app/Http/Middleware/DangerZone.php
index a57b73ebb..3f6fe36a7 100644
--- a/app/Http/Middleware/DangerZone.php
+++ b/app/Http/Middleware/DangerZone.php
@@ -26,9 +26,12 @@ class DangerZone
         }
 
         if ($request->session()->get('sudoModeAttempts') > 3) {
-            $request->session()->pull('redirectNext');
-            $request->session()->pull('sudoModeAttempts');
+            // Invalidate the whole session so no security-related flags survive
+            // the forced logout. Pulling only redirectNext/sudoModeAttempts left
+            // 2fa.session.active (and sudoMode) intact, which allowed the next
+            // login on the same session to skip the 2FA checkpoint.
             Auth::logout();
+            $request->session()->invalidate();
 
             return redirect(route('login'));
         }
diff --git a/tests/Feature/Security/DangerZoneLogoutSessionTest.php b/tests/Feature/Security/DangerZoneLogoutSessionTest.php
new file mode 100644
index 000000000..e1d1baf4d
--- /dev/null
+++ b/tests/Feature/Security/DangerZoneLogoutSessionTest.php
@@ -0,0 +1,48 @@
+<?php
+
+use App\Http\Middleware\DangerZone;
+use App\Models\User;
+use Illuminate\Foundation\Testing\LazilyRefreshDatabase;
+use Illuminate\Http\Request;
+use Illuminate\Session\ArraySessionHandler;
+use Illuminate\Session\Store;
+
+uses(LazilyRefreshDatabase::class);
+
+/*
+|--------------------------------------------------------------------------
+| DangerZone forced-logout clears 2FA session state
+|--------------------------------------------------------------------------
+|
+| When a user is logged out for exceeding sudo-mode attempts, the middleware
+| must clear security-related session flags. A lingering 2fa.session.active
+| would let the next login on the same session skip the 2FA checkpoint.
+|
+| Note: this middleware class is not currently wired to the `dangerzone`
+| alias (which maps to Laravel's RequirePassword), so this exercises the
+| class directly to guard its logic should it be reused.
+|
+*/
+
+it('clears 2fa.session.active when logging out for excessive sudo attempts', function () {
+    $user = User::factory()->create();
+    $user->refresh();
+
+    $request = Request::create('/settings/email', 'GET');
+    $session = new Store('test', new ArraySessionHandler(120));
+    $request->setLaravelSession($session);
+    $request->setUserResolver(fn () => $user);
+
+    $session->put('sudoModeAttempts', 4);
+    $session->put('2fa.session.active', true);
+    $session->put('sudoMode', now()->timestamp);
+
+    $response = (new DangerZone)->handle($request, function ($req) {
+        return response('passed-through', 200);
+    });
+
+    expect($response->isRedirect())->toBeTrue();
+    expect($session->has('2fa.session.active'))->toBeFalse();
+    expect($session->has('sudoMode'))->toBeFalse();
+    expect($session->has('sudoModeAttempts'))->toBeFalse();
+});