Fireworks Says Breach Exposed Billing Data, Datasets and Incomplete Model Weights

Fireworks disclosed a breach that exposed billing data, datasets, and incomplete model weights, prompting the company to disable self-service dataset transfers for batch inference and dataset-based training. The company said it found no impact on its Inference service or Training SDK. The incident matters because customer datasets and partially trained model weights are core assets for teams running fine-tuning and batch workloads on the platform. What to watch next is whether Fireworks restores self-service dataset transfers and whether it discloses the scope of affected customers and any remediation timeline.