mail/compose/ComposeActivity.java in AOSP Mail in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-04-01 supports file:///data attachments, which allows attackers to obtain sensitive information via a crafted application, aka internal bugs 7154234 and 26989185.