[Bug]: 7.2.0, json doc says "openapi": "3.0.4", but this doesn't seem supported by UI

[worthy7]

Describe the bug

I upgraded all Swashbuckle.AspNetCore (3 packages) to 7.2.0 on .NET 9, and when rendering, the UI complains that the version is not set. If I copy and paste my json into Validator I can see that it does not like the version 3.0.4.

Expected behavior

3.0.4 is supported

Actual behavior

Not supported

Steps to reproduce

No response

Exception(s) (if any)

No response

Swashbuckle.AspNetCore version

7.2.0

.NET Version

9

Anything else?

No response

[JuliusTrafi]

Seems like issue occurs with Microsoft.OpenApi 1.6.23 and works with Microsoft.OpenApi 1.6.22

[worthy7]

Yes I just confirmed this. So this is not a bug, but a feature request for this project. Please support OpenApi 3.0.4

[martincostello]

See microsoft/OpenAPI.NET#2030 and swagger-api/swagger-ui#10247.

[martincostello]

Until the upstream issues are resolved, downgrade your version(s) of the Microsoft.OpenApi* package(s) to version 1.6.22.