diff --git a/wp-includes/media.php b/wp-includes/media.php
index 3783865958..cecfb5c0d7 100644
--- a/wp-includes/media.php
+++ b/wp-includes/media.php
@@ -4255,11 +4255,26 @@ function attachment_url_to_postid( $url ) {
 	}
 
 	$sql = $wpdb->prepare(
-		"SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wp_attached_file' AND meta_value = %s",
+		"SELECT post_id, meta_value FROM $wpdb->postmeta WHERE meta_key = '_wp_attached_file' AND meta_value = %s",
 		$path
 	);
 
-	$post_id = $wpdb->get_var( $sql );
+	$results = $wpdb->get_results( $sql );
+	$post_id = null;
+
+	if ( $results ) {
+		// Use the first available result, but prefer a case-sensitive match, if exists.
+		$post_id = reset( $results )->post_id;
+
+		if ( count( $results ) > 1 ) {
+			foreach ( $results as $result ) {
+				if ( $path === $result->meta_value ) {
+					$post_id = $result->post_id;
+					break;
+				}
+			}
+		}
+	}
 
 	/**
 	 * Filters an attachment id found by URL.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index de621212ea..d39139e859 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.3.3-alpha-47131';
+$wp_version = '5.3.3-alpha-47132';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.