diff -r 48c4eec2b7e6 -r 8c2e4d02f4ef wp/wp-includes/block-supports/aria-label.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/block-supports/aria-label.php	Fri Sep 05 18:52:52 2025 +0200
@@ -0,0 +1,70 @@
+<?php
+/**
+ * Aria label block support flag.
+ *
+ * @package WordPress
+ * @since 6.8.0
+ */
+
+/**
+ * Registers the aria-label block attribute for block types that support it.
+ *
+ * @since 6.8.0
+ * @access private
+ *
+ * @param WP_Block_Type $block_type Block Type.
+ */
+function wp_register_aria_label_support( $block_type ) {
+	$has_aria_label_support = block_has_support( $block_type, array( 'ariaLabel' ), false );
+
+	if ( ! $has_aria_label_support ) {
+		return;
+	}
+
+	if ( ! $block_type->attributes ) {
+		$block_type->attributes = array();
+	}
+
+	if ( ! array_key_exists( 'ariaLabel', $block_type->attributes ) ) {
+		$block_type->attributes['ariaLabel'] = array(
+			'type' => 'string',
+		);
+	}
+}
+
+/**
+ * Add the aria-label to the output.
+ *
+ * @since 6.8.0
+ * @access private
+ *
+ * @param WP_Block_Type $block_type       Block Type.
+ * @param array         $block_attributes Block attributes.
+ *
+ * @return array Block aria-label.
+ */
+function wp_apply_aria_label_support( $block_type, $block_attributes ) {
+	if ( ! $block_attributes ) {
+		return array();
+	}
+
+	$has_aria_label_support = block_has_support( $block_type, array( 'ariaLabel' ), false );
+	if ( ! $has_aria_label_support ) {
+		return array();
+	}
+
+	$has_aria_label = array_key_exists( 'ariaLabel', $block_attributes );
+	if ( ! $has_aria_label ) {
+		return array();
+	}
+	return array( 'aria-label' => $block_attributes['ariaLabel'] );
+}
+
+// Register the block support.
+WP_Block_Supports::get_instance()->register(
+	'aria-label',
+	array(
+		'register_attribute' => 'wp_register_aria_label_support',
+		'apply'              => 'wp_apply_aria_label_support',
+	)
+);