diff --git a/src/Http/Middleware/EnsureTwoFactorEnabled.php b/src/Http/Middleware/EnsureTwoFactorEnabled.php
index a375bd5..ce47df6 100644
--- a/src/Http/Middleware/EnsureTwoFactorEnabled.php
+++ b/src/Http/Middleware/EnsureTwoFactorEnabled.php
@@ -87,13 +87,17 @@ protected function shouldPassThrough(Request $request): bool
             return true;
         }
 
+        // trim() empties a root Nova path ("/"), so build the prefix with a
+        // trailing slash only when there is one — otherwise the patterns would
+        // gain a leading slash and never match Request::is()'s slash-less path.
         $novaPath = trim(Nova::path(), '/');
+        $prefix = $novaPath === '' ? '' : "{$novaPath}/";
 
         // Anti-lockout: never block Nova's own assets, logout, or the enrolment
         // page, or an admin could brick themselves / break the SPA. Not
         // configurable — a consumer editing except.* can never strip these.
         if ($request->routeIs('nova.asset.*', 'nova.logout')
-            || $request->is("{$novaPath}/user-security", "{$novaPath}/user-security/*")
+            || $request->is("{$prefix}user-security", "{$prefix}user-security/*")
         ) {
             return true;
         }
diff --git a/tests/Feature/MiddlewareTest.php b/tests/Feature/MiddlewareTest.php
index 1ca767e..8ece625 100644
--- a/tests/Feature/MiddlewareTest.php
+++ b/tests/Feature/MiddlewareTest.php
@@ -133,6 +133,35 @@ function loginAdmin(bool $enrolled = false): User
     get('/nova/user-security/confirm')->assertOk()->assertSee('confirm');
 });
 
+it('allow-lists the user-security subtree when the Nova path is root ("/")', function (): void {
+    // A root-mounted Nova (config nova.path = "/") makes Nova::path() return "/";
+    // the enrolment subtree must still be reachable so an un-enrolled admin can set 2FA up.
+    config(['nova.path' => '/']);
+
+    Route::middleware(['web', EnsureTwoFactorEnabled::class])->group(function (): void {
+        Route::get('/user-security', fn (): string => 'security')->name('nova.pages.user-security');
+        Route::get('/user-security/two-factor-authentication', fn (): string => 'enable');
+    });
+
+    loginAdmin(); // un-enrolled
+
+    get('/user-security', ['Accept' => 'text/html'])->assertOk()->assertSee('security');
+    get('/user-security/two-factor-authentication', ['Accept' => 'text/html'])->assertOk()->assertSee('enable');
+});
+
+it('still redirects an un-enrolled admin to user security when the Nova path is root ("/")', function (): void {
+    config(['nova.path' => '/']);
+
+    Route::middleware(['web', EnsureTwoFactorEnabled::class])->group(function (): void {
+        Route::get('/dashboard', fn (): string => 'dash');
+        Route::get('/user-security', fn (): string => 'security')->name('nova.pages.user-security');
+    });
+
+    loginAdmin();
+
+    get('/dashboard', ['Accept' => 'text/html'])->assertRedirect(route('nova.pages.user-security'));
+});
+
 it('never blocks the Fortify 2FA enrolment endpoints under user-security', function (string $path): void {
     Route::middleware(['web', EnsureTwoFactorEnabled::class])->get($path, fn (): string => 'ok');
     loginAdmin(); // un-enrolled — must still reach every enrolment endpoint