Has NASA confirmed earth now has a second moon orbiting the planet?
It's not true; this object is not a moon of Earth's.

Here's a NASA/JPL announcement of it. 2016 HO3 is the "name" being used for it at the moment.

They're calling it a "quasi-moon". It's in an orbit that is in resonance with Earth's but is not permanently bound. (It's not the first object to be found with such properties too.)