If you are disabled can you get legal aid for a civil court action?

Not automatically. You still have to be below their maximum income cap to give you a free lawyer.

Not just because you're disabled no. If however you are disabled and cannot work or on low income then you are as entitled to apply. It is means tested.
Being disabled is irrelavent,legal aid severely cut some 10 years ago to prevent spurrious actions costing a fortune,although some actions still fall within the very tight conditions.

This has resulted in the many NO WIN NO FEE lawyers.
They will take any case on if they are pretty sure of winning.
For disability cases, most lawyers work on contigency, which doesn't cost you anything unless you win and collect. So you don't really need legal aid.
The CORRECT answer to your question is yes, you can receive legal aid. Since you didn't ask a specific question, the TYPES of legal aid available to you based solely on the facts presented are the following:

Sign Language interpreter if you are deaf.

WheelChair access if you are in a wheel chair.

Guardian if you are suffering from a malady which renders you incapable of understanding the issues or representing yourself.

Now, would you like to add a few facts?
To qualify for legal aid depends on your income and any savings you have. Any solicitor will tell you if you qualify or not.