Yahoo said Wednesday it was notifying some users that hackers may have been able to use a maneuver to break into their accounts without stealing passwords. The notification indicates the investigation into the attacks are in the final stage, according to a source familiar with the matter, noting that messages had been sent to "a reasonably final list" of Yahoo users. A Yahoo spokesman said the company was notifying all potentially affected users and that it had "invalidated" the forged cookies.



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