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OpenAI Assures Customers After Mixpanel Breach Exposes Some API User Data

  • Nov 27, 2025
  • 2 min read

Key Findings


  • OpenAI confirmed a data breach involving its third-party analytics provider Mixpanel

  • The breach exposed limited API user metadata like names, emails, locations, and browser info

  • No passwords, API keys, chat content, or payment data were involved

  • Regular ChatGPT users were not affected, only those interacting with the OpenAI API


Background


OpenAI, the company behind the popular AI assistant ChatGPT, has confirmed a data breach involving Mixpanel, a third-party analytics tool used by OpenAI to monitor activity on its API platform. This breach was not a direct attack on OpenAI's systems, but rather a compromise of Mixpanel, where an attacker accessed and exported data linked to OpenAI API users.


Data Exposure


The exposed data was limited to account metadata typically collected by analytics tools, including:


  • Name

  • Email address

  • Referring website

  • City, state, or country

  • Internal user or organization ID

  • Browser and operating system information


Impact and Response


  • OpenAI immediately removed Mixpanel from its production systems and launched a review to identify the full scope of the incident.

  • The company has notified all affected users and is conducting a broader audit of its external vendors.

  • OpenAI has advised users to enable multi-factor authentication and be cautious of any unsolicited messages or phishing attempts related to this incident.


Lessons Learned


  • This type of third-party breach is not uncommon, as companies often rely on various analytics, payment, and support platforms that introduce additional risk.

  • While no system is completely bulletproof, OpenAI's quick response in removing the affected vendor, investigating the damage, and notifying users is a positive example of incident handling.

  • The incident highlights the need for organizations to maintain "digital sovereignty" and retain tighter control over their data and security, rather than fully outsourcing to third-party providers.


Sources


  • https://hackread.com/openai-api-mixpanel-data-breach-chatgpt/

  • https://securityaffairs.com/185121/data-breach/openai-data-may-have-been-exposed-after-a-cyberattack-on-analytics-firm-mixpanel.html

  • https://www.youtube.com/watch?v=OFvBXPIYrn0

  • https://www.reddit.com/r/cybersecurity/comments/1p7vdfn/openai_mixpanel_breach_exposed_api_user_metadata/

  • https://xpert.digital/en/data-leak-at-openai-service-provider-mixpanel/

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