diff --git a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
index 4beda26210..0122f9a773 100644
--- a/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
+++ b/src/wp-includes/rest-api/endpoints/class-wp-rest-posts-controller.php
@@ -169,7 +169,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 			'parent'         => 'post_parent__in',
 			'parent_exclude' => 'post_parent__not_in',
 			'search'         => 's',
-			'slug'           => 'name',
+			'slug'           => 'post_name__in',
 			'status'         => 'post_status',
 		);
 
@@ -882,6 +882,7 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 			'post_parent__not_in',
 			'posts_per_page',
 			'date_query',
+			'post_name__in',
 		);
 
 		$valid_vars = array_merge( $valid_vars, $rest_valid );
@@ -2112,9 +2113,9 @@ class WP_REST_Posts_Controller extends WP_REST_Controller {
 		}
 
 		$params['slug'] = array(
-			'description'       => __( 'Limit result set to posts with a specific slug.' ),
-			'type'              => 'string',
-			'validate_callback' => 'rest_validate_request_arg',
+			'description'       => __( 'Limit result set to posts with one or more specific slugs.' ),
+			'type'              => 'array',
+			'sanitize_callback' => 'wp_parse_slug_list',
 		);
 
 		$params['status'] = array(
diff --git a/tests/phpunit/tests/rest-api/rest-posts-controller.php b/tests/phpunit/tests/rest-api/rest-posts-controller.php
index d941f22d6a..dcebfe8422 100644
--- a/tests/phpunit/tests/rest-api/rest-posts-controller.php
+++ b/tests/phpunit/tests/rest-api/rest-posts-controller.php
@@ -254,6 +254,42 @@ class WP_Test_REST_Posts_Controller extends WP_Test_REST_Post_Type_Controller_Te
 		$this->assertEquals( 'Apple', $data[0]['title']['rendered'] );
 	}
 
+	public function test_get_items_multiple_slugs_array_query() {
+		$this->factory->post->create( array( 'post_title' => 'Apple', 'post_status' => 'publish' ) );
+		$this->factory->post->create( array( 'post_title' => 'Banana', 'post_status' => 'publish' ) );
+		$this->factory->post->create( array( 'post_title' => 'Peach', 'post_status' => 'publish' ) );
+		$request = new WP_REST_Request( 'GET', '/wp/v2/posts' );
+		$request->set_param( 'slug', array( 'banana', 'peach' ) );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 200, $response->get_status() );
+		$data = $response->get_data();
+		$this->assertEquals( 2, count( $data ) );
+		$titles = array(
+			$data[0]['title']['rendered'],
+			$data[1]['title']['rendered'],
+		);
+		sort( $titles );
+		$this->assertEquals( array( 'Banana', 'Peach' ), $titles );
+	}
+
+	public function test_get_items_multiple_slugs_string_query() {
+		$this->factory->post->create( array( 'post_title' => 'Apple', 'post_status' => 'publish' ) );
+		$this->factory->post->create( array( 'post_title' => 'Banana', 'post_status' => 'publish' ) );
+		$this->factory->post->create( array( 'post_title' => 'Peach', 'post_status' => 'publish' ) );
+		$request = new WP_REST_Request( 'GET', '/wp/v2/posts' );
+		$request->set_param( 'slug', 'apple,banana' );
+		$response = $this->server->dispatch( $request );
+		$this->assertEquals( 200, $response->get_status() );
+		$data = $response->get_data();
+		$this->assertEquals( 2, count( $data ) );
+		$titles = array(
+			$data[0]['title']['rendered'],
+			$data[1]['title']['rendered'],
+		);
+		sort( $titles );
+		$this->assertEquals( array( 'Apple', 'Banana' ), $titles );
+	}
+
 	public function test_get_items_status_query() {
 		wp_set_current_user( 0 );
 		$this->factory->post->create( array( 'post_status' => 'draft' ) );