Alex Merced • 7/13/2026

REST Catalog Credential Vending for Iceberg

This article discusses the security risks of using static cloud storage keys in multi-engine Iceberg lakehouses and presents credential vending as a solution. It details how the Iceberg REST catalog issues short-lived, scoped credentials per table and operation, reducing blast radius and improving rotation. The post covers the handshake process, the division of control between catalog and storage, Polaris-style configuration, and the importance for autonomous agents. It emphasizes that open lakehouses require temporary, mediated access over static keys for enterprise-scale security.

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#Polaris #REST Catalog #Iceberg