DeepSeek Exposed: Users Can Access Each Other's Conversations with a Special Input[D]

A vulnerability in DeepSeek's website exposed a significant amount of data, including user chats. A publicly accessible ClickHouse database belonging to DeepSeek allowed full control over database operations and exposed over a million lines of log streams containing chat history, secret keys, backend details, and other highly sensitive information. The Wiz Research team immediately and responsibly disclosed the issue to DeepSeek, which promptly secured the exposure.

Source: r/MachineLearning | 2026-05-17