Telegram Desktop through 2.0.1, Telegram through 6.0.1 for Android, and Telegram through 6.0.1 for iOS allow an IDN Homograph attack via Punycode in a public URL or a group chat invitation URL.
| Software | From | Fixed in |
|---|---|---|
| telegram / telegram | - | 6.0.1.x |
| telegram / telegram_desktop | - | 2.0.1.x |