A flaw in Telegram Desktop let a bot's message plant hidden JavaScript inside chats that users exported to HTML files, security researchers at ExPatch said in a writeup published on September 12.

In Telegram, the message looked ordinary, with a link button, and the script ran only when someone opened the export file in a web browser. It could then copy every message in that file to



Source: TheHackerNews
Source Link: https://thehackernews.com/2026/09/telegram-desktop-flaw-lets-hidden.html