SEV-3: reported, blocks only with --strict
Any website can call your API
What goes wrong
Another site calls your endpoints from its own pages, and you never see it in your logs as a problem.
How to fix it
Replace the wildcard with the exact origins of your app.
Check your app
npx sigshipRun it in your project. It reports this check as cors-wildcard, along with 16 others. Nothing leaves your machine.