When CORS request is made to a Salesforce REST API endpoint with an invalid/expired OAuth access token, the CORS headers are not added to the response
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When CORS request is made to a Salesforce REST API endpoint with an invalid/expired OAuth access token, the CORS headers are not added to the response

API , Authentication , Winter 23

Last updated 2022-10-06 ·Reference W-10748231 ·Reported By 0 users

Fixed - Winter '23

When a request is sent from an origin registered in the salesforce org's CORS settings to a Salesforce REST API data endpoint with an invalid/expired OAuth access token, the CORS headers are not added to the response. As a result, the browser regards the response not as an authentication failure but as a CORS error. The returned HTTP status code 401 cannot be handled.

>> Actual Result :
The CORS headers are not added to the response when the request doesn't have a valid token.

>> Expected Result :
The CORS headers are added regardless of whether the request has a valid token or not.

1. Create a connected app to be used at step#5.
>> Enable OAuth Settings: Check
>> Callback URL: https://temp
>> Selected OAuth Scopes: Manager user data via APIs (api)
2. Create a CORS record. ([Setup]-[Security Controls]-[CORS]-[New])
>> Origin URL Pattern: https://*.salesforce.com:6101
3. Create an HTML app named "test.html" to access salesforce endpoint referring the following body. Replace "test-org.my" with your "my domain" in the following code.
<!DOCTYPE html>
<meta charset="UTF-8">
<title>CORS Test</title>
<input type="text" id="sid" name="sid" maxlength="150" size="150"/><br/>
<button onclick="sendRequest()">Click me</button>
<script type="text/javascript">
function sendRequest() {
var sfSessionId = document.getElementById("sid").value;
var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
console.log("=========== XMLHttpRequest readyState:", this.readyState, ", status:", this.status);
if (this.readyState == 4 && this.status == 200) {
//action to be performed when the document is ready:
alert("Apex REST call succeeded");
xhttp.onerror = function () {
console.log("=========== XMLHttpRequest readyState:", this.readyState, ", status:", this.status);
alert("Apex REST call failed");
xhttp.open("GET", "https://Test-org.my.localhost.sfdcdev.salesforce.com:6101/services/data/v52.0/search/?q=FIND%20%7Bandy%7D", true);
xhttp.setRequestHeader("Authorization", "Bearer "+sfSessionId);

4. Run the following command to get an OAuth token.
$ curl -X POST https://<your host>:6101/services/oauth2/token -d 'grant_type=password&client_id=<Consumer Key>&client_secret=<Consumer Secret>&username=<username>&password=<password>'
5. Open "test.html" from browser using your host name, not "my domain".
6. Enter the oauth token and push the Click me button. Confirm the request is successful.
7. Press F12 to show console.
8. Replace the token in the text input with any invalid value and push the button again. The CORS error will appear instead of just the 401 status code error due to invalid/unauthorised token


Reported By (0)

Is it Fixed?

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