ChatGPT leaks user conversations and personal information across sessions
Date: 2023
Affected: OpenAI ChatGPT users
Attack vector: data-exfiltration
Category: real-world
Severity: High

Multiple reports documented ChatGPT surfacing conversation snippets and personal data from other users' sessions, raising concerns about session isolation, history sharing and training-data memorization in production LLM services.


Mitigations:

Architectural layers (MAESTRO):