Widespread use of unpatched open source code in the most popular Android apps distributed by Google Play has caused significant security vulnerabilities, suggests an American Consumer Institute report. Thirty-two percent — or 105 apps out of 330 of the most popular apps in 16 categories sampled — averaged 19 vulnerabilities per app, according to the report. Researchers found critical vulnerabilities in many common applications, including some of the most popular banking, event ticket purchasing, sports and travel apps.