No known issues for those without a gallbladder.
When it comes to CBD oils the fats are from the carrier oils (in our case omega fatty acids found in the hemp plant). The amount of fat present in CBD oil is minimal (only consisting of the fatty acids in the hemp oil). This should be no issue for those without a gallbladder. Remember CBD taken sublingually is absorbed directly into the blood then passed through the liver for metabolism. The effect of CBD absorption should be negligible. Now if you were to consume a CBD infused cheeseburger with CBD infused French fries for example, that would be an issue. Your body has other ways of digesting fats without a gallbladder. The human body is an amazing thing!