So make sure to check ur account for any password reset requests.Multiple Steam accounts have been hijacked over the last week, thanks to a bug.
The Steam Store and website were briefly unavailable this morning, but it is unclear whether this is related to any security issues.
Last week, a security "loophole" allowed anyone in the world to access your account using the Lost Password function on Steam, as long as they had your username. From there they could change your password and gain access to your account with no verification needed.
The security issue has now been fixed, however the bug could have been impacting the Steam service all of last week from July 21-25. Valve told Kotaku that it is "resetting passwords on accounts with suspicious password changes during that period."