diff --git src/wp-includes/class-wp-admin-bar.php src/wp-includes/class-wp-admin-bar.php
index 69021f527b..69236ff267 100644
--- src/wp-includes/class-wp-admin-bar.php
+++ src/wp-includes/class-wp-admin-bar.php
@@ -55,6 +55,8 @@ class WP_Admin_Bar {
 
 		add_action( 'admin_head', 'wp_admin_bar_header' );
 
+		add_action( 'login_head', 'wp_admin_bar_header' );
+
 		if ( current_theme_supports( 'admin-bar' ) ) {
 			/**
 			 * To remove the default padding styles from WordPress for the Toolbar, use the following code:
@@ -69,6 +71,7 @@ class WP_Admin_Bar {
 		}
 
 		add_action( 'wp_head', $header_callback );
+		add_action( 'login_head', $header_callback, 1000 );
 
 		wp_enqueue_script( 'admin-bar' );
 		wp_enqueue_style( 'admin-bar' );
diff --git src/wp-includes/css/admin-bar.css src/wp-includes/css/admin-bar.css
index d0f4457e7a..4b6b4f2fbb 100644
--- src/wp-includes/css/admin-bar.css
+++ src/wp-includes/css/admin-bar.css
@@ -620,6 +620,8 @@ html:lang(he-il) .rtl #wpadminbar * {
 	height: 32px;
 	padding: 0 2px;
 	z-index: 1;
+	background: transparent;
+	border: 0;
 }
 
 #wpadminbar #adminbarsearch:before {
@@ -659,6 +661,7 @@ html:lang(he-il) .rtl #wpadminbar * {
 	transition-duration: 400ms;
 	transition-property: width, background;
 	transition-timing-function: ease;
+	min-height: 0;
 }
 
 #wpadminbar > #wp-toolbar > #wp-admin-bar-top-secondary > #wp-admin-bar-search #adminbarsearch input.adminbar-input:focus {
diff --git src/wp-includes/default-filters.php src/wp-includes/default-filters.php
index 26cdfeba20..1ff9979f95 100644
--- src/wp-includes/default-filters.php
+++ src/wp-includes/default-filters.php
@@ -535,8 +535,10 @@ add_action( 'template_redirect', '_wp_admin_bar_init', 0 );
 add_action( 'admin_init', '_wp_admin_bar_init' );
 add_action( 'before_signup_header', '_wp_admin_bar_init' );
 add_action( 'activate_header', '_wp_admin_bar_init' );
+add_action( 'login_head', '_wp_admin_bar_init' );
 add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );
 add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );
+add_action( 'login_footer', 'wp_admin_bar_render', 0 );
 
 // Former admin filters that can also be hooked on the front end
 add_action( 'media_buttons', 'media_buttons' );