There are a couple of loopholes, yes. Eastern Rite Catholicism has different rules, and I understand they've been allowing married men to become priests for nearly a thousand years now, but they can't remarry or become bishops.

Under the Western Rite, the only loophole I know of is that married Anglican priests who convert to Catholicism can be reordained while remaining married.

IIRC, during the Communist regime in Poland, quite a few underground Catholic priests married because celibacy would have given them away, and there was some controversy about how to handle this when communism collapsed. I think they were eventually required to stay married but keep separate from their wives, or something equally painful.