The ChatGPT Redis Bug: Cross-Tenant Leaks in One Line
A redis-py cancellation bug plus a disabled key-prefix let some ChatGPT users see strangers’ chat titles and billing data. Multi-tenant cache lessons.
A redis-py cancellation bug plus a disabled key-prefix let some ChatGPT users see strangers’ chat titles and billing data. Multi-tenant cache lessons.
ChatGPT landed November 30, 2022 and hit 100M users in two months — and immediately made prompt injection a practical attack class. Still unsolved in 2026.
For much of 8 November 2023, ChatGPT and parts of OpenAI’s API cycled in and out of service under a denial-of-service wave claimed by Anonymous Sudan, with smaller recurrences through the month. OpenAI confirmed the DDoS, rolled global WAF rules, and absorbed a false-positive tax on legitimate users. Nothing was breached — the story is availability risk wrapped around AI dependence. This post walks the campaign’s anatomy, Microsoft’s Storm-1359 telemetry link, and the business-continuity lessons for anyone running on AI vendors.