Get Repository-level Security Advisories via GraphQL?

Is it possible to get Security Advisories listed for a specific repository via GraphQL?

For example, I want to retrieve all the Security Advisories listed here. I can’t seem to find them in a repository() query’s data structure. Using a securityAdvisory() query doesn’t work for these repo-level GHSA’s, it would seem.

The following query attempts to get GHSA-xhm9-p6mw-357m.

{
  securityAdvisory(ghsaId:"GHSA-xhm9-p6mw-357m"){
    ghsaId
  }
}

Results in the following response:

{
  "data": {
    "securityAdvisory": null
  },
  "errors": [
    {
      "type": "NOT_FOUND",
      "path": [
        "securityAdvisory"
      ],
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "message": "Could not resolve to a Security Advisory with ID 'GHSA-xhm9-p6mw-357m'"
    }
  ]
}

I’m guessing it’s just not possible to pull repo-level GHSAs via the GraphQL API?