Android apps with over 250 million downloads are still susceptible to a severe vulnerability in a Google library that was patched in August 2020. The vulnerability was assigned an 8.8 (High) rating and was fixed by Google in Google Play Core Library version 1.7.2.1. Many popular apps, including Chrome, Edge, Facebook, Instagram, WhatsApp, and Snapchat, are still vulnerable to the vulnerability. Researchers from Check Point Research have discovered that there are still apps with millions of installs using the vulnerable library over three months later.
Source: https://www.bleepingcomputer.com/news/security/android-apps-with-200-million-installs-vulnerable-to-security-bug/