Fireworks AI breach exposed customer payment data, Notion AI chats
Notion says chat logs from its Notion AI Insights feature were taken and that about 1% of customers were affected.
Fireworks AI has disclosed a cyberattack in which attackers breached a cloud provider and gained access to the company's development systems, according to a security advisory from the company reported by TechCrunch. Customer payment information and some datasets were taken, Fireworks AI said.
Notion confirmed this week that hackers obtained chat logs of customers who used its Notion AI "Insights" feature, including model inputs and outputs. Notion disconnected its systems from Fireworks on November 3 and deleted data stored in Fireworks systems, and said the incident affected about 1% of its customers.
Fireworks AI said it believes the hackers were financially motivated and aimed to steal access to large language models in order to sell tokens. The platform serves tens of thousands of customers worldwide, including legal tech company Harvey and AI company Cursor.
The company has not said how many of its own customers were affected beyond the payment data and datasets it reported as taken.
Earlier incident
Fireworks AI experienced another security incident in October 2025, according to the background available on the company.
Quick answers
What did hackers take from Fireworks AI?
Fireworks AI said attackers took customer payment information and some datasets after breaching a cloud provider and reaching its development systems.
How many Notion customers were affected?
Notion said the incident affected about 1% of its customers.
Who are Fireworks AI's customers?
Fireworks AI says it serves tens of thousands of customers worldwide, including Harvey and Cursor.