Red Hat JBoss EAP: CVE-2019-11358: Prototype Pollution

jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If an unsanitized source object contained an enumerable __proto__ property, it could extend the native Object.prototype.. A Prototype Pollution vulnerability was found in jquery. Untrusted JSON passed to the `extend` function could lead to modifying objects up the prototype chain, including the global Object. A crafted JSON object passed to a vulnerable method could lead to denial of service or data injection, with various consequences.