NET

1 It is actually reported that sexual immorality exists among you, the kind of immorality that is not permitted even among the Gentiles, so that someone is cohabiting with his father’s wife.

Darby

Dealing with Sins in the Chruch - Church Discipline

1 It is universally reported^D8254 [that there is] fornication among you, and such fornication as [is] not even among the nations, so that one should have his father's wife.

Darby Bible Notes

reported - This does not quite give the sense. It was the reputation they had by common report.

KJV

Dealing with Sins in the Chruch - Church Discipline

1 It is reported commonly [that there is] fornication among you, and such fornication as is not so much as named among the Gentiles, that one should have his father's wife.