In January 2025, cybersecurity experts at Wiz Research found that Chinese AI specialist DeepSeek had suffered a data leak, putting more than 1 million sensitive log streams at risk.

According to the Wiz Research team, they identified a publicly accessible ClickHouse database belonging to DeepSeek. This allowed “full control over database operations, including the ability to access internal data”, Wiz Research stated, with more than a million lines of log streams involved, containing chat history, secret keys and more.

Wiz immediately reported the issue to DeepSeek, which quickly secured the exposure. Still, the incident underscored the danger of data leakage.

Intentional or unintentional?

Data leakage is a broad concept, covering a range of scenarios. As IBM notes, the term in general

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