GraphQl. Retrieve customer's shopping cart without an authorization token

[atwixfirster]

Preconditions (*)

1. Sample data
2. Login as Veronica Costello
3. Add any product(s) into a shopping cart

Steps to reproduce (*)

1. Copy PHPSESSID value from a browser window

2. Set PHPSESSID in a header

3. Run the next GraphQL query to retrieve a customer's cart

{
  cart(cart_id: "kSjlU0dTeaH9CUuaRGFSUTOejwTN9ZLn") {
    id
    items {
      id
      quantity
      product {
        sku
      }
    }
  }
}

Expected result (*)

1. GraphQl should use an Authorization token (Bearer) ONLY to retrieve a customer's cart.

Actual result (*)

1. Guest sees products which customer has been added into shopping cart.

[m2-assistant]

Hi @atwixfirster. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

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• Information on your environment
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Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, please, review the Magento Contributor Assistant documentation.

@atwixfirster do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

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[atwixfirster]

Fix provided in #27373

[m2-assistant]

Hi @dmytro-ch. Thank you for working on this issue.
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