diff --git a/core/Controller/LoginController.php b/core/Controller/LoginController.php
index 93b695dd9992c..1c75b1f3c8be3 100644
--- a/core/Controller/LoginController.php
+++ b/core/Controller/LoginController.php
@@ -107,7 +107,9 @@ public function logout() {
 		}
 		$this->userSession->logout();
 
-		return new RedirectResponse($this->urlGenerator->linkToRouteAbsolute('core.login.showLoginForm'));
+		$response = new RedirectResponse($this->urlGenerator->linkToRouteAbsolute('core.login.showLoginForm'));
+		$response->addHeader('Clear-Site-Data', '"cache", "cookies", "storage", "executionContexts"');
+		return $response;
 	}
 
 	/**
diff --git a/tests/Core/Controller/LoginControllerTest.php b/tests/Core/Controller/LoginControllerTest.php
index ca32a04efe1de..bd2d0143caf30 100644
--- a/tests/Core/Controller/LoginControllerTest.php
+++ b/tests/Core/Controller/LoginControllerTest.php
@@ -95,6 +95,7 @@ public function testLogoutWithoutToken() {
 			->willReturn('/login');
 
 		$expected = new RedirectResponse('/login');
+		$expected->addHeader('Clear-Site-Data', '"cache", "cookies", "storage", "executionContexts"');
 		$this->assertEquals($expected, $this->loginController->logout());
 	}
 
@@ -124,6 +125,7 @@ public function testLogoutWithToken() {
 			->willReturn('/login');
 
 		$expected = new RedirectResponse('/login');
+		$expected->addHeader('Clear-Site-Data', '"cache", "cookies", "storage", "executionContexts"');
 		$this->assertEquals($expected, $this->loginController->logout());
 	}