The security expert Chris Vickery has discovered a misconfigured archive exposes the personal details of 191 million U.S. voters.

A misconfigured database is the root cause of the exposure of around 191 Million voter records. The records include voters’ full names, unique voter IDs, unique voter IDs, date of births and phone numbers.

The database was discovered by the security expert Chris Vickery, the same expert that recently confirmed that information exposed in over 650 terabytes of MongoDB data  was associated with 25 million user accounts from various apps and services, including 13 million users of the OS X optimization program MacKeeper.

The database containing voters’ information was discovered on December 20th, Vickery provided all the details about his disconcerting discovery to DataBreaches.net. The archive includes over 191 Million Americans’ personal identifying information (PII).

Vickery has found also his own information in the database containing 300GB of voters’ data.

“My immediate reaction was disbelief,” Vickery said. “I needed to know if this was real, so I quickly located the Texas records and ran a search for my own name. I was outraged at the result. Sitting right in front of my eyes, in a strange, random database I had found on the Internet, were details that could lead anyone straight to me. How could someone with 191 million such records be so careless?”

Below the detailed list of attributes stored in the leaked database.

• Full name (first, middle, last)
• Residential address
• Mailing address
• A unique voter ID
• State voter ID
• Gender
• Date of birth
• Date of registration
• Phone number
• Political affiliation
• A detailed voting history since 2000
• Fields for voter prediction scores

Vickery confirmed to have found in the voters’ database the records belonging to a number of police officers in his city, he has also verified the authenticity of the information.

The database doesn’t include Social Security Numbers, driver license numbers, or financial data, but the information it includes could be attractive for both cybercriminals and nation-state actors.

The principal media agencies are trying to identify possible responsible for the accidental exposure of so important data, but it is not clear who has misconfigured the archive.