DuckDuckGo: SSRF on duckduckgo.com/iu/

Normally, a call to https://duckduckgo.com/iu contains a query parameter u with some path using the domain yimg.com. This call will succeed in most cases. F337121 And if we change that path to something like https://google.com it's rejected. F337118 However, it appears that the check that ensures...