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BreachesNov 12, 2026

Notion Customer Data Compromised in Fireworks AI Hack

Notion AI chat transcripts accessed in Fireworks AI hack affecting less than 1% of workspaces.

Notion is notifying customers about a data breach involving Fireworks AI, a platform for AI models. Attackers gained unauthorized access to Notion AI chat transcripts used for the Insights feature. Fewer than 1% of Notion workspaces were affected, and most transcripts were unattributable. Notion advises affected customers to treat the data as exposed and rotate any compromised credentials.

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The lesson from this incident

Full lesson

Notion's customer data was compromised not through a direct attack on Notion itself, but through a breach of Fireworks AI, a third-party vendor handling AI chat transcripts for the Insights feature. This is a classic supply chain security failure: sensitive customer data was processed and stored by an external platform that became the attack surface. The incident highlights the risk of extending trust implicitly to vendors who handle personal or sensitive data on your behalf. Even when a company's own security posture is strong, a weaker link in the vendor chain can expose customer data at scale. Organizations must treat third-party data processors as extensions of their own security perimeter and hold them to equivalent standards.

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Notion AI (product)Notion (vendor)Fireworks AI (vendor)LLMJacking (technology)