The specified path is not allowed

[kassner]

Preconditions

1. Magento 2.3.6; (the error seems to happen on 2.4, but the message is different: The path is not allowed: media/something-invalid.xml)

Steps to reproduce

1. Make sure the file var/resource_config.json does not exist;
2. Access {BASEURL}/media/something-invalid.xml;
3. expected results don't happen;
4. Now the var_resoruce_config.json file exists is generated;
5. Access {BASEURL}/media/something-invalid.xml;
6. expected results happen;

Expected result

1. 404 error;
2. No errors logged;

Actual result (*)

1. 404 error 👍;

The specified path is not allowed.
#0 /var/www/magento/vendor/magento/framework/App/Bootstrap.php(261): Magento\MediaStorage\App\Media->launch()
#1 /var/www/magento/pub/get.php(84): Magento\Framework\App\Bootstrap->run(Object(Magento\MediaStorage\App\Media))
#2 {main}

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Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

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

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• Steps to reproduce
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@magento give me 2.4-develop instance - upcoming 2.4.x release

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[AndyJAllen]

There's a thread on the Magento forums on this or a similar error...never really got any resolution. Such a vague error. I've been getting a lot of these in my system.log file for a long time and I have no idea how to debug the situation or if its even causing any issues for anyone.

https://community.magento.com/t5/Magento-2-x-Technical-Issues/main-ERROR-The-specified-path-is-not-allowed/m-p/132383

[m2-assistant]

Hi @engcom-November. 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: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).

  Details

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  Details

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[engcom-November]

Verified the issue on Magento 2.4-develop branch and the issue is reproducible.
Accessing the site with url: http:///media/something-invalid.xml giving 404 error but also below error is getting generated in logs. (var/log/system.log)
[2022-09-13T10:11:33.372312+00:00] main.ERROR: The path is not allowed: media/something-invalid.xml []
Note: This issue is not observed for other urls ex: http://mg24.local/media/fewffefe.html. No error logs generated.