How do roles, authorities, and OAuth scopes relate in Spring Security?

Treats GrantedAuthority as the common representation while explaining role prefixes, scope mapping, and domain permission design.

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GrantedAuthority is Spring Security's common representation of a permission-like value on an authentication. A role is usually represented as an authority with the ROLE_ prefix; hasRole("ADMIN") applies that convention, while hasAuthority checks the exact string. OAuth scopes from a JWT resource server are commonly mapped to authorities such as SCOPE_orders.read. The names must match the configured claim mapping and authorization rules.

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GrantedAuthority, ROLE_ convention, hasRole versus hasAuthority, JWT scopes, permission granularity, and claim mapping.

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Spring ultimately evaluates authorities; roles and scopes are naming conventions and upstream models mapped into them.
GrantedAuthority is Spring Security's common representation of a permission-like value on an authentication. A role is usually represented as an authority with the ROLE_ prefix; hasRole("ADMIN") applies that convention, while hasAuthority checks the exact string. OAuth scopes from a JWT resource server are commonly mapped to authorities such as SCOPE_orders.read. The names must match the configured claim mapping and authorization rules.
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Using hasRole with an already prefixed value unintentionally.
Treating a scope as proof of resource ownership.
Copying identity-provider group names into every domain rule.

How do roles, authorities, and OAuth scopes relate in Spring Security?

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