Telegram Desktop Flaw Lets Hidden JavaScript Exfiltrate Messages From HTML Exports

Sep 15, 2026 - 18:52
 0
Telegram Desktop Flaw Lets Hidden JavaScript Exfiltrate Messages From HTML Exports
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

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Raghib Awan Raghib Awan is an Information Security and Technology professional with expertise spanning cybersecurity, cloud security, IT infrastructure, information risk, regulatory compliance, and enterprise security. He is also an author at TeQManch, a technology and cybersecurity news platform covering cyber threats, artificial intelligence, BFSI technology, data privacy, digital risk, and emerging technology trends.