Independent public-records tracker. Not a government website.Facts from official state, HHS and SEC filings

Data breaches in November 2018

Data breaches first reported to a state attorney general, HHS or the SEC in November 2018: 1 breach. Facts come from official filings with US state attorneys general, the U.S. Department of Health and Human Services (HHS) and the SEC; each breach page links its sources.

Updated Oct 21, 2026 · Showing 1–1 of 1

Organization First filed People affected Information exposed Filed with
Marriott International, Inc.Marriott International, Inc. breach history 500,000,000
  • Financial account number
  • Payment card
California AG, Maine AG

Other months in 2018

People affected is the official total from a filing, or “At least” the sum of state filings where no total was filed. Spotted an error? Report a correction.