GraphQL OPTIONS request fails with error 500.

[william-gooch]

Preconditions and environment

• Magento 2.4.7

Steps to reproduce

1. Attempt to make an OPTIONS request against the GraphQL endpoint curl -i -X OPTIONS http://test.site/graphql

Expected result

Returns the "unexpected EOF" error but with a 200 status code so that CORS requests succeed.

Actual result

Returns the "unexpected EOF" error with a 500 status code, so CORS preflight requests always fail.

Additional information

This seems like it re-introduces MDVA-35312 which was previously fixed in Magento 2.4.3.
I believe this is caused by https://github.com/magento/magento2/blame/c6bc8300e771e5e96ce9ac6c116746fe3de80544/app/code/Magento/GraphQl/Controller/GraphQl.php#L194 which parses the query and returns an error even if the request validators succeed.

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

Hi @william-gooch. Thank you for your report.
To speed up processing of this issue, make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, Add a comment to the issue:

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[william-gooch]

@magento give me 2.4-develop instance

[magento-deployment-service]

Hi @william-gooch. Thank you for your request. I'm working on Magento instance for you.

[m2-assistant]

Hi @engcom-Delta. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

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[magento-deployment-service]

Hi @william-gooch, here is your Magento Instance: https://e4f1dc96fd2a29c0dfef62b22c58308a.instances-prod.magento-community.engineering
Admin access: https://e4f1dc96fd2a29c0dfef62b22c58308a.instances-prod.magento-community.engineering/admin_3d27
Login: 98152775
Password: bb2af77d0df9

[william-gooch]

Confirmed to occur on 2.4-develop instance

[engcom-Delta]

Hi @william-gooch ,

Verified the issue on 2.4.7 and 2.4-develop, it is reproducible.

Hence, Confirming the issue.

Steps to reproduce:-

1. Attempt to make an OPTIONS request against the GraphQL endpoint curl -i -X OPTIONS http://test.site/graphql

2.4.7

2.4-develop