Why is Thunk-Redux turning an object into a string?

I've come across a strange issue with thunk-redux. I am writing a React-Redux app that calls a public API, and displays the data in a table. However, when I incorporated thunk middleware to handle the asynchronous API calls, my data is being stringified after the action is dispatched to the reducer.

index.js (action creator)

export const FETCHING_DATA = 'FETCHING_DATA';
export const FETCH_SUCCESS = 'FETCH_SUCCESS';
export const ERROR = 'ERROR';
export const getData = () => {

return {

type : FETCHING_DATA

}

}
export const getDataSuccess = (data) => {

return {

type : FETCH_SUCCESS,

payload: data

}

}
export const getDataFailure = () => {

return {

type : ERROR

}

}
export function searchCVE(cve){
<span class="hljs-keyword">const</span> url = <span class="hljs-string">`<span class="hljs-subst">${CVE_URL}</span>api/cve/<span class="hljs-subst">${cve}</span>`</span>;
<span class="hljs-keyword">return</span> <span class="hljs-function"><span class="hljs-params">dispatch</span> =&gt;</span> {
    dispatch(getData());

    fetch(PROXY + url)
    .then(<span class="hljs-function"><span class="hljs-params">blob</span> =&gt;</span> blob.json())
    .then(<span class="hljs-function"><span class="hljs-params">data</span> =&gt;</span> {
        <span class="hljs-built_in">console</span>.log(<span class="hljs-string">'Request: '</span>, data);
        dispatch(getDataSuccess(data))
    })
    .catch(<span class="hljs-function"><span class="hljs-params">e</span> =&gt;</span> {
        <span class="hljs-built_in">console</span>.log(e);
        dispatch(getDataFailure(e.message))
    });

}

}

data_reducer.js (reducer)

import {FETCHING_DATA ,FETCH_SUCCESS, ERROR } from ‘…/actions/index.js’;

const initialState = {

payload:[],

fetching: false,

error: false

}

export default function(state=initialState, action){

console.log('Got CVE: ', action);
switch (action.type){
    case FETCHING_DATA: return {payload:[], fetching: true, ...<span class="hljs-keyword">state</span>}
    case FETCH_SUCCESS: return [action.payload, ...<span class="hljs-keyword">state</span>]
    case ERROR: return {payload:[], error: true, ...<span class="hljs-keyword">state</span>}
         
}
return <span class="hljs-keyword">state</span>;

}

As you can see in the index.js action creator, console.log('Request: ', data); displays the JSON object I want. However, when I {console.log('TEST: ’ + this.props.cve)} in my table component, the console shows:

TEST: [object Object]

At no point in my app am I “stringifying” my data - why/where could thunk-redux be turning my data into a string? I thank the community for any insight it can provide.

#reactjs #redux