Apple said on Wednesday that it will rush an emergency patch to users that fixes an embarrassing login bug in its High Sierra operating system. The patch is expected to be pushed out by Apple sometime Wednesday. The serious High Sierra login bug surfaced Tuesday, giving anyone with physical access to a computer running the latest version of the operating system admin access simply by putting root in the user name field. Apple admitted to the mistake stating, Security is a top priority for every Apple product, and regrettably we stumbled with this release of MacOS
Source: https://threatpost.com/apple-announces-emergency-patch-to-fix-high-sierra-login-bug/129039/