I see what you're saying, but IMO the actual vulnerability there is that Clickhouse (by default?) was exposed fully unauthenticated and without any header requi

I see what you're saying, but IMO the actual vulnerability there is that Clickhouse (by default?) was exposed fully unauthenticated and without any header requirement. Allowing completely unauthenticated access to Clickhouse, even read-only, means that they're just asking for issues like this.