diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index 0fda61ab85..575a2fbaea 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -5992,13 +5992,12 @@ function wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file ) {
 function wp_get_attachment_metadata( $attachment_id = 0, $unfiltered = false ) {
 	$attachment_id = (int) $attachment_id;
 
-	$post = get_post( $attachment_id );
-	if ( ! $post ) {
+	$data = get_post_meta( $attachment_id, '_wp_attachment_metadata', true );
+
+	if ( empty( $data ) ) {
 		return false;
 	}
 
-	$data = get_post_meta( $post->ID, '_wp_attachment_metadata', true );
-
 	if ( $unfiltered ) {
 		return $data;
 	}
@@ -6012,7 +6011,7 @@ function wp_get_attachment_metadata( $attachment_id = 0, $unfiltered = false ) {
 	 *                                  if the object does not exist.
 	 * @param int        $attachment_id Attachment post ID.
 	 */
-	return apply_filters( 'wp_get_attachment_metadata', $data, $post->ID );
+	return apply_filters( 'wp_get_attachment_metadata', $data, $attachment_id );
 }
 
 /**
diff --git a/tests/phpunit/tests/media.php b/tests/phpunit/tests/media.php
index 4c5c65444f..366859a8a9 100644
--- a/tests/phpunit/tests/media.php
+++ b/tests/phpunit/tests/media.php
@@ -2387,6 +2387,15 @@ EOF;
 		return $data;
 	}
 
+	/**
+	 * @ticket 50679
+	 */
+	function test_wp_get_attachment_metadata_should_return_false_if_no_attachment() {
+		$post_id = self::factory()->post->create();
+		$data   = wp_get_attachment_metadata( $post_id );
+		$this->assertFalse( $data );
+	}
+
 	/**
 	 * @ticket 37813
 	 */