Learn what role-based access control (RBAC) is, how it works for APIs, and how it compares to ABAC and PBAC for modern access control.

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Role-based access control (RBAC) is a security model that restricts system and API access by assigning permissions to predefined roles rather than individual users. Roles like 'admin', 'engineer', or 'sales rep' are mapped to specific permissions (read, write, delete), simplifying access management and enforcing least privilege. Key benefits include reduced management complexity, easier compliance, and scalable cascading updates. However, RBAC struggles in dynamic, multi-tenant, or context-heavy environments, often leading to role explosion and over-permissioning. Granular RBAC (G-RBAC) offers finer control at the resource level. More advanced alternatives—attribute-based access control (ABAC) and policy-based access control (PBAC)—extend RBAC by incorporating contextual attributes and centralized policy stores respectively. All three models appear in API security via standards like OAuth 2.0, OpenID Connect, and mTLS, with implementation options ranging from database controls to JWT claims and middleware authorization servers.

What Is Role-Based Access Control (RBAC)?

Evolving RBAC: Fine-Grained Access Control