CVE-2026-57848 Stoat for Android Internal File Disclosure via Exported ShareTargetActivity URI Validation

Stoat for Android exports the chat.stoat.activities.ShareTargetActivity component reachable to any process on the device via the android.intent.action.SEND intent and accepts the file to share as a URI supplied through the android.intent.extra.STREAM extra. The activity does not validate or filte...