Description
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.
Remediation
References
Related Vulnerabilities
Joomla! Core 3.3.x Security Bypass (3.3.0 - 3.3.3)
PHP Out-of-bounds Read Vulnerability (CVE-2019-11046)
Oracle Application Server Other Vulnerability (CVE-2005-2093)
Envoy Proxy Out-of-bounds Write Vulnerability (CVE-2019-18801)
WordPress Plugin WooCommerce PayPal Checkout Payment Gateway Parameter Tampering (1.6.8)