I think your husband should be able to bring up whatever issues. My concern was that he might bring it up in a light of placing blame and making you look crazy and unstable. That’s not right. Therapy will not work if it becomes about blame

If however he brings it up without blaming, then I think he should be able to.

You can’t really have successful therapy if certain topics are taboo. Like if he can’t bring up drinking, then he can say you can’t bring up XYZ issues either. I understand if the only issue is that he is an abuser, then I can’t imagine how therapy would work. You want a neutral party tell him that he is an abuser and he is going to stop because some therapist tells him. That’s why couples therapy with abusers isn’t even recommended. How would it work? How would a stranger make your abusive husband stop abusing you?

If however you approach it with the idea that this marriage isn’t working and you want help in making it work, then it’s a different story. But then some things might need to be disclosed to show a full picture.