There’s a misunderstanding, deliberate or not, about what sola scriptura is.
Scripture is the final and ultimate authority. God’s word is settled in heaven and not the least stroke of the pen shall pass away from it. It is what it is, the inspired, Spirit breathed word of God.
If Scripture needs interpretation, then something like the CCC needs interpretation. The CCC is not exempt from needing interpretation any more than Scripture is and is just as prone to misinterpretation as Scripture is.
Just as there is no way that anyone can prevent someone from deliberately misinterpreting Scripture if they so choose, just as there is no way of preventing anyone from deliberately misinterpreting the CCC if they so choose.
So the contention that because Scripture can be misinterpreted therefore the concept of individual interpretation is rendered invalid is an invalid argument itself. EVERYTHING that humans produce is subject to errors in or deliberate misinterpretation. It is not the fault or responsibility of the author, nor does it discredit the work. It only discredits the person doing the misinterpretation.
Scripture is true, inerrant, infallible, God breathed. You line up with it or you’re wrong.
How did one’s like the apostles Peter and Paul explain the meaning of the Scriptures? By turning to the Scriptures themselves.
We need not be an apostle to follow their example and thankfully we have concordances, interlinears, access to Bible manuscripts at the touch of a few keys, the work of archaeologists and more.
And as James said in James 1:5, If we lack wisdom, ask for it in faith that we will receive it.