OpenAI Says No User Data Breached After Security Issue With Open-Source Library

May 16, 2026Updated: May 16, 2026

May ‌14—OpenAI said on Wednesday ‌it found no evidence that its user ‌data was accessed after a ⁠security issue involving a supply-chain attack on TanStack npm, an open-source ​library.

Here are some details:

• The ChatGPT-maker ⁠said it found no evidence that its production systems or intellectual property were compromised, or that their software was altered

• OpenAI said two ‌employee ⁠devices in its corporate environment were impacted after ‌TanStack, a widely used open-source library, got compromised earlier this ​week

• Limited credential material was exfiltrated ​from these code repositories ​and no other information or code was impacted, OpenAI said

• ⁠The AI firm said that it isolated the impacted systems immediately after the attack and ​temporarily restricted code-deployment workflows, ⁠to contain impact

• OpenAI said ​it is rotating ​code-signing ‌certificates, which would require macOS users to update their applications

• OpenAI ‌did not immediately respond to a Reuters ⁠request for further details