The glitch that Google didn't want you to know about is exposed.
Google Plus, the company's failed social network that was meant to rival Facebook, was apparently left vulnerable.
Google says it found a bug that meant the private data of 500,000 users was unprotected.
The Wall Street Journal says the situation went on for nearly three years.
"This is an error that Google made in its code. So beginning in 2015, according to this Wall Street Journal report, basically a lot of the personal information that you put on Google Plus or that Google Plus got about you was exposed," said Samuel Burke, CNN business correspondent.
The company is taking heat for not disclosing the security problem to the public.
No word on when exactly Google Plus will be officially shut down.