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.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Telegram | Telegram | * | 6.0.1 (including) |
| Telegram_desktop | Telegram | * | 2.0.1 (including) |
| Telegram-desktop | Ubuntu | bionic | * |
| Telegram-desktop | Ubuntu | eoan | * |
| Telegram-desktop | Ubuntu | focal | * |
| Telegram-desktop | Ubuntu | trusty | * |