# Fireworks AI says cloud-provider breach exposed customer billing data and model weights > Source: > Published: 2026-11-09 21:05:32+00:00 # Fireworks AI says cloud-provider breach exposed customer billing data and model weights **Fireworks said an October 24th intrusion through a cloud provider reached development machines, affecting billing data and, for some accounts, secrets, datasets and incomplete model weights.** By [RuntimeWire Staff](https://runtimewire.com/author/runtimewire-staff) · Published · Updated Primary source: [Bloomberg Technology](https://www.bloomberg.com/news/articles/2026-11-09/nvidia-backed-fireworks-ai-notifies-customers-of-its-second-hack-in-weeks) ## Why it matters Fireworks sells companies a place to build specialized models around proprietary data. The November 9th disclosure says that material, including datasets and incomplete model weights for a limited set of accounts, was within reach of an intruder who entered through a cloud provider. Secrets can be rotated quickly. Customer confidence in where sensitive model work lives takes longer to rebuild. Fireworks AI, the model infrastructure provider co-founded by CEO Lin Qiao, told customers on November 9th that data was accessed during an October 24th intrusion through a cloud provider. It was Fireworks' second known security breach in weeks, [Bloomberg reported](https://www.bloomberg.com/news/articles/2026-11-09/nvidia-backed-fireworks-ai-notifies-customers-of-its-second-hack-in-weeks?ref=runtimewire).… When you purchase through links in our articles, [we may earn a small commission](https://runtimewire.com/affiliate-monetization-standards). This doesn’t affect our editorial independence.