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API-SECURITY5 MIN READ

Build the PATCH allowlist

Construct a safe request DTO for a PATCH endpoint to prevent object property authorization failures.

PATCH /users/me needs to update profile fields without letting users write privileged fields. Domain model is not input model: define client-editable fields, validate them, apply them intentionally. Blocklists feel fast but fail when new sensitive fields are added or when attackers guess internal names. Name allowed fields For PATCH /users/me, allow only displayName, timezone, and marketingOptIn. The list comes from the feature requirement, not from the current database columns. Create a DTO/schema Define UpdateProfileRequest with those fields, types, lengths, enums, and additionalProperties:false. The schema rejects role, tenantId, isAdmin, and future fields unless deliberately added. Map intentionally Apply each allowed field…

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