Ticket #46124: 46124.3.patch

src/wp-includes/theme.php

@@ -1208 +1208 @@
         $width  = absint( $header->width );
         $height = absint( $header->height );
 
+        // Use alternative text assigned to the image, if available. Otherwise, leave it empty.
+        if ( ! empty( $header->attachment_id ) && ! empty( get_post_meta( $header->attachment_id, '_wp_attachment_image_alt', true ) ) ) {
+                $alt = get_post_meta( $header->attachment_id, '_wp_attachment_image_alt', true );
+        } else {
+                $alt = '';
+        }
+
         $attr = wp_parse_args(
                 $attr,
                 array(
@@ -1214 +1221 @@
                         'src'    => $header->url,
                         'width'  => $width,
                         'height' => $height,
-                        'alt'    => get_bloginfo( 'name' ),
+                        'alt'    => $alt,
                 )
         );