Vercel, a cloud platform for developing and deploying apps, has disclosed a breach of its internal systems, which was caused by the compromise of a third-party app called Context.ai used by one of its employees. The incident allowed an attacker to gain access to some Vercel environments and environment variables, but the company says it has no evidence that sensitive environment variables were accessed. Vercel has brought in an incident response provider to investigate and has notified law enforcement. The company has contacted a limited subset of customers that were impacted and is recommending that all customers check activity logs for suspicious activity and rotate environmental variables as a precaution.