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high severity May 06, 2026 · scope unconfirmed

Braintrust AI Firm Breach Exposes Customer API Keys

AI evaluation platform Braintrust notified customers of unauthorized access to one of its AWS accounts containing stored API keys and secrets. The company has urged all customers to immediately rotate keys and has contained the incident.

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Braintrust AI Firm Breach Exposes Customer API Keys
Data exposed:
  • api-keys

An AI evaluation platform called Braintrust disclosed a breach of one of its AWS accounts that stored customer API keys and secrets, prompting the company to advise all users to rotate their credentials immediately.

According to public reporting, unauthorized parties gained access to the affected AWS environment. Braintrust moved to contain the incident and notified customers that the exposed data consisted primarily of API keys. The exact number of affected customers remains unknown, and available reporting does not indicate whether the keys were viewed or exfiltrated before the breach was contained. The company has stated that it has taken steps to secure the compromised account.

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