Is tafsir al-Qummi authentic?

We can see shias from the past till our times relying on commentary of Ali ibn Ibrahim al-Qummi. Each book in Islamic nation has its own chain of transmitters. Including this commentary of Ali ibn Ibrahim.

Let us check page 27 of on-line version of this tafsir, to see who is the very first person who is in the chain of narration.

As you can see first person in the chain of transmitters is – Abul Fadl al-Abbas ibn Muhammad ibn al-Qasim ibn Hamzah ibn Mosa ibn Jafar.

This person wasn’t mention by shia scholars of rijal, as said ash-Shahrudi in “Mustadrakat ilmul rijal al-hadith” (4/357/#746)