Notion, the digital workspace platform, disclosed that a security breach at its AI infrastructure provider, Fireworks AI, exposed Notion AI chat transcripts in a small number of workspaces.

The disclosure comes shortly after Fireworks AI confirmed that an attacker accessed its development environment via a third-party cloud provider on October 23 and compromised resource metadata, billing information, model weights, and datasets for some customers.

Fireworks AI experienced another breach in early October, when hackers accessed environment variables containing API keys and tokens stored as secrets for a limited number of accounts.