What do you do when one family member wants to angrily vent to you about another family member?

If it makes you feel uncomfortable, tell them. I think being honest is always the best way to handle this kind of situation, and then suggesting they have a conversation with the family member they are having problems with.

I have had to deal with this situation so many times in my life. Try to allow the other family member to vent out their anger, and when they are calm speak with them about other ways to solve family issues. Both family members should be able to talk things out together at some point and resolve these issues. As family you shouldn't be putting each other down behind each other's backs, which can happen if one family member is angry and says things they may not mean.

Hmmm, I think. Allow and defuse. You don't need to get too involved in the emotions, but providing an ear to the family member might help quite a lot.

Listen to what they have to say, but if they're being unreasonable or rude, stand up to them. No need to accept cruel comments against loved ones, even from family members.

We all need someone to talk about our feelings, within family or out of family, if some family member wants to angrily vent to you about another family member, just listen to it with patience and calm, it doesn't mean you have to agree , if the speaking tone seems too uncomfortable to you to bear , make it clear to that member,...a person after few minutes of vent out, get calm down on its own,and begin to think about the issue more rationally.

Be there as an ear and listen to whatever they have to say, even if you dont agree with it, sometimes you just have to be there to listen to people

If you are uncomfortable with what they are saying maybe its best you tell them that you are. Being in the middle of things can sometimes get you into trouble also. So you have to be careful of that.

The response is in your question. If it were me, I would just hear him/her out ... not agree or disagree with what he/she has to say but just to be fully present, listen to them and provide him/her the space to ventilate. If you're worried to be dragged into these family feuds, perhaps, let him/her know that you don't want to get involved but will just take out the time to listen.

When one family member talks angrily about another I would say let them steam a little. Just because they think something about a family member doesn't mean you have to. We will always have our own opinions.

Remember that it's just a vent. Let their opinion not affect your view of the other family member. Practice controlled emotional involvement, if that's difficult, remind them that you cannot be involved in the conversation without actually being involved, so politely excuse yourself