Got anything more recent than 600 years ago?
Well, since defined DOGMA does not change, it really matters little. These are the three dogmatic statements the Church has made, and these have been reaffirmed over and over and over again. Not that it matters because you aren't going to submit your mind and will to any Church teaching on this matter anyway. But just for good measure, here are some more.
27. Some say they are not bound by the doctrine, explained in Our Encyclical Letter of a few years ago, and based on the sources of revelation, which teaches that the Mystical Body of Christ and the Roman Catholic Church are one and the same thing.[6] Some reduce to a meaningless formula the necessity of belonging to the true Church in order to gain eternal salvation. Others finally belittle the reasonable character of the credibility of Christian faith. Pius XII in Humani Generis, 1950
22. Actually only those are to be included as members of the Church who have been baptized and profess the true faith, and who have not been so unfortunate as to separate themselves from the unity of the Body, or been excluded by legitimate authority for grave faults committed. "For in one spirit" says the Apostle, "were we all baptized into one Body, whether Jews or Gentiles, whether bond or free." [17] As therefore in the true Christian community there is only one Body, one Spirit, one Lord, and one Baptism, so there can be only one faith. [18] And therefore if a man refuse to hear the Church let him be considered -- so the Lord commands -- as a heathen and a publican. [19] It follows that those are divided in faith or government cannot be living in the unity of such a Body, nor can they be living the life of its one Divine Spirit. Pius XII, 1943
BOTH of the following are infallible, and CONDEMNED propositions, which means they are FALSE and HERETICAL.
17. Good hope at least is to be entertained of the eternal salvation of all those who are not at all in the true Church of Christ. -- Encyclical "Quanto conficiamur," Aug. 10, 1863, etc.
18. Protestantism is nothing more than another form of the same true Christian religion, in which form it is given to please God equally as in the Catholic Church. -- Encyclical "Noscitis," Dec. 8, 1849.
Would you like more? Or does the Church have to pronounce on this EVERY YEAR for it to be true?