Today I noticed water leaking out of the cabinet under the kitchen sink. So I looked in that cabinet and noticed a significant leak. The leak is due to two pipes not even being connected, although that wasn't obvious until I touched the pipes. This is strange since I didn't disconnect the pipes and I can't imagine anyone else did either. See the pictures.
Assuming the pipes were originally connected, I can't tell how. Perhaps they were glued or perhaps some connecting part fell off. Does anyone know if this is a quick fix, and what to do about it?