fixed issue #18458

Author: Shubham Sharma

app/code/Magento/Ui/view/base/web/js/modal/modal-component.js

@@ -93,7 +93,7 @@ define([
          * @returns {Object} Chainable.
          */
         initModalEvents: function () {
-            this.options.keyEventHandlers.escapeKey = this.options.outerClickHandler = this[this.onCancel].bind(this);
+            this.options.keyEventHandlers.escapeKey = this[this.onCancel].bind(this);
 
             return this;
         },

app/code/Magento/Ui/view/base/web/js/modal/modal.js

@@ -424,8 +424,7 @@ define([
          * Creates overlay, append it to wrapper, set previous click event on overlay.
          */
         _createOverlay: function () {
-            var events,
-                outerClickHandler = this.options.outerClickHandler || this.closeModal;
+            var events;
 
             this.overlay = $('.' + this.options.overlayClass);
 
@@ -437,7 +436,6 @@ define([
             }
             events = $._data(this.overlay.get(0), 'events');
             events ? this.prevOverlayHandler = events.click[0].handler : false;
-            this.options.clickableOverlay ? this.overlay.unbind().on('click', outerClickHandler) : false;
         },
 
         /**