[scarface74]

You as an end user jailbreaking your own phone is not a "security hole".

I'm not aware of any non-tethered jailbreak for iOS 10

[nb777]

I think he's talking about application wide (not user specific) "secrets" in the javascript layer.

[menckenjr]

Yes, I am. As for untethered jailbreaks, http://pangu8.com/10.html mentions a few.

[davewritescode]

Yes it is, jailbreaking bypasses critical security features of your phone. Granted, it's required to run certain kinds of software but there are better ways to run your own code on your phone (like getting your own developer certificate) that preserve the security model.