OpenAI discloses API customer data breach via Mixpanel vendor hack
Recorded: Nov. 27, 2025, 1:02 p.m.
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OpenAI discloses API customer data breach via Mixpanel vendor hack By Ionut Ilascu November 27, 2025 OpenAI is notifying some ChatGPT API customers that limited identifying information was exposed following a breach at its third-party analytics provider Mixpanel. “This was not a breach of OpenAI’s systems. No chat, API requests, API usage data, passwords, credentials, API keys, payment details, or government IDs were compromised or exposed,” OpenAI says in a press release. 7 Security Best Practices for MCP Ionut Ilascu Previous Article Post a Comment Community Rules You need to login in order to post a comment Not a member yet? Register Now You may also like: Popular Stories Shai-Hulud malware infects 500 npm packages, leaks secrets on GitHub Microsoft to remove WINS support after Windows Server 2025 Microsoft: Exchange Online outage blocks access to Outlook mailboxes Sponsor Posts Worried about finance scams? Get Avast Free Antivirus with intelligent online scam detection WSUS can’t keep up in a remote-first world. Cloud-native patching fixes what VPNs never could CMMC Made Simple. Get audit-ready with Huntress—faster, easier, and more affordable. Empowering IT teams with intelligence‑driven cyber threat research Overdue a password health-check? Audit your Active Directory for free Review of Passwork: Affordable Enterprise-Grade Password Manager Upcoming Webinar Follow us: Main Sections News Community Forums Useful Resources Welcome Guide Company About BleepingComputer Terms of Use - Privacy Policy - Ethics Statement - Affiliate Disclosure Copyright @ 2003 - 2025 Bleeping Computer® LLC - All Rights Reserved Login Username Password Remember Me Sign in anonymously Sign in with Twitter Not a member yet? Register Now Help us understand the problem. What is going on with this comment? Spam Abusive or Harmful Inappropriate content Strong language Other Read our posting guidelinese to learn what content is prohibited. Submitting... |
OpenAI has disclosed a data breach impacting a subset of its ChatGPT API customers, stemming from a vulnerability within its third-party analytics provider, Mixpanel. The incident, initially detected on November 8th, involved a smishing campaign and resulted in the exposure of limited identifying information for users interacting with the API. Specifically, the data compromised included the user’s name, associated email address, approximate location based on browser data (city, state, and country), operating system, browser, referring websites, and organization or user IDs linked to the API account. CoinTracker, a cryptocurrency portfolio tracking platform, was also implicated in the breach, with additional data comprising device metadata and limited transaction counts. Notably, no sensitive credentials such as API keys, passwords, or payment details were accessed, alleviating the immediate need for password resets or key regeneration for affected users. However, the potential for this exposed data to be exploited in phishing or social engineering attacks is a significant concern. OpenAI has taken swift action, including removing Mixpanel from its production services, investigating the full scope of the incident, and issuing notifications to all subscribers. As a preventative measure, Mixpanel has implemented stricter security controls, including securing affected accounts, revoking active sessions, rotating compromised credentials, blocking the threat actor’s IP addresses, and resetting passwords for all employees and has added new controls to prevent future breaches. The company's CEO, Jen Taylor, emphasized that only those users directly interacting with the API were impacted and that individuals who haven’t received direct communication from Mixpanel were not involved. Despite this, OpenAI issued a broad warning to all subscribers, advising vigilance against suspicious messages originating from unofficial OpenAI domains, and urged users to enable two-factor authentication and never transmit sensitive information through email, text, or chat. The breach highlights the interconnectedness of data ecosystems and the potential risks associated with relying on third-party vendors. The incident underscores the critical importance of stringent security protocols and continuous monitoring by organizations utilizing API services. The response by OpenAI demonstrates a commitment to mitigating the damage and preventing recurrence, including the implementation of extensive security measures within Mixpanel. Moving forward, this incident necessitates a re-evaluation of risk management strategies for organizations dependent on API services, especially those requiring secure access to sensitive data. The vulnerability’s origin – a smishing campaign – emphasizes the evolving nature of cyber threats and the need for comprehensive user education regarding phishing attempts. OpenAI’s actions represent a foundational step in demonstrating accountability but will likely trigger further scrutiny and potentially impact user trust in the API platform. The event offers valuable insights for security professionals and underscores the necessity for robust vendor risk management practices in a landscape increasingly defined by complex technological integrations. |