Actually, no.

We know exactly what the original authors wrote in the original Greek. Anyone can go back and check the 5600 manuscripts dating back to the first generation. They all agree. Nothing got changed other than minor typos easily corrected by "ANDing" all the copies together.

The only New Testament book written as late as 95 AD was Revelation. Others, like the book of Acts were written in the early 60's. More than half of the New Testament is comprised of letters written prior to Peter and Paul's deaths in 67 AD. All of the New Testament was written by people who had first hand experience with the events and had spent their lives traveling and telling their experiences until it undoubtedly became rote memory. It was not passed verbally from person to person before being written down.

One exception might be the writings of Dr. Luke who traveled with Paul serving as a historian and "investigative reporter" who interviewed a lot of eyewitnesses to compile his accounts.

Finally Jesus explicitly promised them supernatural ability to recall everything perfectly:

All this I have spoken to you while I am still with you. But the Advocate, the Holy Spirit, whom the Father will send in My name, will teach you all things and will remind you of everything I have told you.