Stop Waste in Government Contracting Act of 2017 This bill requires executive agencies to use competitive procedures for procurement contracts valued at $10 million or more, with a national security exception. The Inspector General of the General Services Administration must report to Congress: on updating the Federal Procurement Data System and data stored on it during the preceding 10-year period, identifying any issues of each agency relating to the use of such system that may have affected the reliability of data stored on it, detailing which data is potentially unreliable, and including recommendations for improving the system.