Fireworks AI Hit by Back-to-Back Hacks

Episode 1 · Fireworks AI hacked by cybercrime group; customer data and partial model weights exposed (2026-11-10, 11 posts)

Fireworks, a highly valued AI inference provider, has been hacked with customer data exposed. The company confirmed the attack was carried out by a financially motivated cybercrime group, and the scope keeps expanding: beyond the initially disclosed storage keys, account and billing information, secrets, datasets, and even partial model weights of some customers were accessed. Several well-known customers are considering or have decided to move off the platform.

Confirmed

• Fireworks' official security advisory confirmed the breach, with impact beyond the initial disclosure: expanding from storage keys to account and billing information, secrets, datasets, and partial (incomplete) model weights of some customers (@harrisedouard relaying the official advisory)
• The company says the attackers were a financially motivated criminal group (@harrisedouard)
• Per The Information reporter Steph Palazzolo, Fireworks has notified customers including legal AI firm Harvey of the data breach (@stephpalazzolo)
• Per Forbes, sources say some customers are migrating their data out of Fireworks systems (@annatonger)
• Per @nmasc, customers such as Notion and Cursor are working with Fireworks to handle the breach — the company's second security incident in weeks
• One customer described a series of "very serious attacks," criticized Fireworks' poor communication, and decided to leave (@annatonger)

Not Yet Confirmed

• The full scope of the incident and details of the leaked data are still being handled and investigated
• Whether all customers will ultimately migrate remains undecided; so far it is only "considering migration" or partial migration

Why It Matters

• This is a rare security incident directly targeting an AI inference infrastructure provider, exposing supply-chain risks of third-party inference hosting around secrets, datasets, and model weight protection
• Access to model weights (even partial, incomplete ones) is a serious signal for Fireworks — whose business centers on open-source model hosting — and its customers
• A second security incident within weeks, coupled with poor communication, could accelerate customer churn and shake market confidence in independent inference providers

• Fireworks AI hacked: customer data and models compromised, customers flee — annatonger · 2026-11-10
• Cybercriminals Hack AI Inference Provider Fireworks, Customer Data and Models Affected — annatonger · 2026-11-10
• Fireworks, top-valued inference provider, hit by hack exposing customer data; clients eye exit — steph_palazzolo · 2026-11-10
• Fireworks hack exposed customer billing data, secrets and some model weights — harris_edouard · 2026-11-10
• Fireworks AI hit by second breach in weeks, customer data of Notion and Cursor compromised — nmasc_ · 2026-11-10
• Fireworks AI reportedly hacked, with model weights and datasets said to be stolen — pzakin · 2026-11-10
• Fireworks AI says hackers accessed customer datasets, partial model weights, and billing info over the past month — annatonger · 2026-11-10
• Fireworks hack exposed customer billing data, model weights and datasets amid $30B fundraise — cedric_chee · 2026-11-10
• AI infra provider Fireworks hacked; customer data and AI models impacted, some customers fleeing — AccBalanced · 2026-11-10
• Fireworks CEO discloses October breach: third-party cloud access led to customer data impact — lqiao · 2026-11-10
• Fireworks breached twice: $17.5B AI firm admits customer datasets, in-training models accessed — ccerrato147 · 2026-11-10

Episode 2 · Fireworks AI Hit by Second Breach in Weeks (2026-11-10, 2 posts)

Fireworks AI, an Nvidia-backed inference provider, is notifying customers of its second breach within weeks, affecting clients including Notion and Cursor, Bloomberg reports.

• Nvidia-backed Fireworks AI notifies customers of its second hack in weeks, Bloomberg reports — demian_ai · 2026-11-10
• Nvidia-backed Fireworks AI hit by second hack in weeks, Notion and Cursor affected — dinabass · 2026-11-10