Over the weekend, a security breach changed the permission settings on millions of profiles in GEDmatch, a DNA database used by genealogists. For three hours, DNA profiles were visible to all members, including law enforcement agencies, which sometimes use the site to find partial matches to crime scene DNA.
Usually, GEDmatch users can select whether or not they want to share their DNA profile with police. When the attack reset users’ permissions, their data was temporarily visible to law enforcement. It’s unclear if any police searched the database during that time.