Gosia Wozniacka, Associated Press
This Dec. 10, 2013, file photo shows Cover Oregon Executive Director Dr. Bruce Goldberg at a news conference at Cover Oregon headquarters in Durham, Ore.

PORTLAND, Ore. — A Klamath Falls woman who applied for health coverage through Cover Oregon says the insurance exchange mailed her the personal information of other applicants.

Ann Migliaccio told The Associated Press she received documents last week containing the names and birth dates of two applicants from Hillsboro. She says the documents did not include Social Security numbers.

Migliaccio has since mailed the information back to Cover Oregon.

Cover Oregon officials say they are investigating the incident.

Officials say this is the 18th security breach in the past six months. They say the information inadvertently shared in these breaches included addresses, names, dates of birth and internal Cover Oregon IDs, but no Social Security numbers.

Last year, after Cover Oregon's failed launch, officials reported three security breaches involving Social Security information.