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Mixpanel Breach Exposes Developer Profiles — OpenAI Says ChatGPT Users Unaffected

10:30 PM, 11/27/2025
Mixpanel Breach Exposes Developer Profiles — OpenAI Says ChatGPT Users Unaffected

Summary: A security breach at analytics firm Mixpanel may have exposed limited profile information — names, emails and approximate locations — for some users of OpenAI’s developer platform. OpenAI says its systems and ChatGPT end users were not breached, and sensitive data like passwords, payments and chat logs remain secure. Mixpanel traced the incident to a smishing attack detected on Nov. 8 and is notifying affected customers while working with law enforcement. Developers are urged to treat unexpected messages with caution to avoid phishing attempts.

OpenAI is warning developers after a security incident at analytics provider Mixpanel may have exposed limited profile information for some users of OpenAI’s developer platform. The company said its own systems were not breached and ChatGPT end users were not affected.

OpenAI said the compromised records may include limited analytics data such as names, email addresses and approximate locations for certain API users. The company emphasized that sensitive items — including account passwords, payment information, chat logs and API request contents — were not accessed.

Mixpanel, which serves more than 11,000 corporate customers, traced the intrusion to a “smishing” attack detected on November 8. Smishing uses deceptive text messages to trick recipients into revealing credentials or installing malware. Mixpanel’s CEO, Jen Taylor, said the company is notifying customers believed to be affected and has engaged law enforcement as part of its investigation.

Why this matters

Although the data exposed is described as limited and of relatively low sensitivity, cybersecurity experts warn it can still be combined to create convincing phishing campaigns targeted at developers. Jake Moore, a cybersecurity advisor, noted that even basic profile details can help attackers craft fraudulent messages that appear legitimate.

What developers should do

OpenAI is urging developers to be vigilant: treat unexpected emails, texts or messages with caution, verify senders independently, and avoid clicking links or opening attachments from unknown or unexpected sources. Organizations should also review access controls, enable multifactor authentication where available, and monitor for suspicious account activity.

OpenAI reiterated that its prominence makes it a frequent target for attackers and encouraged developers and partners to remain alert. The companies have not disclosed how many records were affected, and investigations are ongoing. OpenAI did not immediately reply to a request for comment.

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