OpenAI data breach: What happened and what you need to know

Technology Nov 27, 2025

OpenAI just revealed a data breach that hit users of its API platform. The breach occurred on November 9, 2025, when an attacker gained unauthorized access to Mixpanel's systems and exported a dataset.
While OpenAI says their main systems are still safe, this slip-up means API users could be at risk of phishing scams.

What info was leaked—and how is OpenAI responding?

Usernames, email addresses, and user IDs tied to API accounts were exposed in the breach.
OpenAI is reaching out directly to those affected and has already dropped Mixpanel from its tools.
They're urging everyone to watch out for sketchy emails or messages—reminding users that they'll never ask for passwords or API keys by email—and recommending multi-factor authentication for extra safety.