Telegram Desktop HTML Export Vulnerability Enables Hidden JavaScript Exfiltration
Researchers discover flaw allowing bot-planted scripts to steal message data from exported chats

Key Takeaways
- A vulnerability in Telegram Desktop allows hidden JavaScript injection via bot-planted messages in chat exports.
- The malicious script executes client-side when the exported HTML file is opened in a web browser.
- The flaw potentially enables exfiltration of all message content within the exported chat file.
Related Security News

Official MCP Python SDK Flaw Can Let Malicious Servers Steal OAuth Credentials
The maintainers of the official MCP Python SDK disclosed a security vulnerability that could allow a malicious server to trick applications into divulging OAuth credentials. The issue affects the handling of client secrets, authorization codes, and PKCE proof keys when communicating with token endpoints.

Star Blizzard Campaign Targets 100+ Organizations with Fake Event Invitations
Microsoft reports that the Russian state-sponsored threat actor Star Blizzard has been conducting a sustained campaign since January 2026, using fake event invitations to trick targets into installing a backdoor on Windows computers. The operation has affected more than 100 organizations, primarily in the U.S. and U.K., with victims tied to Ukraine. At least one infection has been confirmed, though the full extent of breaches and data exfiltration remains unverified.


