Why in the open source world do goal posts always move? It’s a public open source service. Speaking purely on this vulnerability, it’s an extension listed in the OpenVSX ecosystem. Regardless if Cursor vetted all of these extensions or not I would still be incredibly hesitant like everyone should be.
Now do we need better solutions? Definitely and I do hope cursor will contribute towards it but I won’t hold them to it. They switched to OpenVSX less than a month ago, too soon to really say much at this point.