Hacker Claims Full Breach of Russia’s Max Messenger, Threatens Public Leak

A hacker using the alias CamelliaBtw has claimed responsibility for a major data breach involving Max Messenger, according to a post published yesterday on the DarkForums cybercrime marketplace and hacker forum.

The forum thread, titled “ Max Messenger – Full User Infrastructure & SQL Dump,” alleges that the attacker gained complete access to the messaging platform’s production systems exactly one year after its public launch. The post describes what would amount to a total compromise of user data, backend infrastructure, and proprietary source code.

What is Max Messenger

Max is a cross-platform messaging and multifunction app released on March 26, 2025, by the tech company VK through its subsidiary, Communication Platform LLC. It has been heavily promoted within Russia as a “national messenger” alternative to foreign services like WhatsApp and Telegram and has seen growth in registered users, reportedly reaching millions across Russia and neighboring countries.

The service provides messaging, voice ...