The Constitution and its amendments are designed to protect citizens from the government, not from private corporations. There may be other laws preventing this sort of credit reporting, but the Constitution does not.
"...in Pembina Consolidated Silver Mining Co. v. Pennsylvania - 125 U.S. 181 (1888), the Court clearly affirmed the doctrine, holding, "Under the designation of 'person' there is no doubt that a private corporation is included [in the Fourteenth Amendment]"