Can I get third party API fields as Foreign key to my Django Model?

That's true we can make foreign key relationships between models in Django. How about grabbing some fields from third party API fields as Foreign key for a specific Django model?

Here is my Django model budiness_process.py

class BusinessImpact(models.Model, ModelWithCreateFromDict):

client = models.ForeignKey(
    accounts_models.Client, on_delete=models.CASCADE)
business_process = models.ForeignKey(
    BusinessProcess, on_delete=models.CASCADE)
hierarchy = models.CharField(max_length=255)
business_assets = models.CharField(max_length=255)
asset_name = models.CharField(max_length=255)
vendors = models.CharField(max_length=255)
product = models.CharField(max_length=255)
version = models.CharField(max_length=10)
cpe = models.CharField(max_length=255)
asset_type = models.CharField(max_length=10)
asset_categorization = models.CharField(max_length=255)
asset_risk = models.CharField(max_length=50)
_regulations = models.TextField(blank=True)
_geolocation = models.TextField(blank=True)

def __str__(self) -> str:
    return self.hierarchy + " - " + self.business_assets

Here is my serializer.py

class BusinessImpactSerializer(serializers.ModelSerializer):
business_process = BusinessProcessListSerializer()
class Meta:
    model = models.BusinessImpact
    fields = "__all__"

Here is third API implementation for retrieving some of it's fields.

 @api_view(
    ["GET"],
)
def cve_summery(request, key):
    r = requests.get(
        "https://services.nvd.nist.gov/rest/json/cves/1.0?cpeMatchString={}".format(
            key)
    )
    if r.status_code == 200:
        result = []
        res = r.json().get("result").get("CVE_Items")
        for rs in res:
            data = {
                "VulnID": rs.get("cve").get("CVE_data_meta").get("ID"),
                "Summery": rs.get("cve").get("description").get("description_data"),
                "exploitabilityScore": rs.get("impact")
                .get("baseMetricV2")
                .get("exploitabilityScore"),
                "severity": rs.get("impact").get("baseMetricV2").get("severity"),
                "impactScore": rs.get("impact").get("baseMetricV2").get("impactScore"),
            }
            result.append(data)
        return Response(result)
    return Response("error happend", r.status_code)

So my intention here is, can I get "severity": rs.get("impact").get("baseMetricV2").get("severity") as Foreign key in my BusinessImpact model?

Thanks!