Act this weekWhat happenedDreamHost says attackers exploited a flaw in its web File Manager from August to October 23, 2026 and stole FTP/SFTP usernames and passwords.
Who is affectedDreamHost customers who logged into the File Manager in that period, plus a limited number of webmail users whose session details may have been exposed.
What to do- 1Reset your DreamHost email and FTP/SFTP passwords if you have not already.
- 2Check your website files for changes you did not make.
- 3Review webmail forwarding rules and filters for anything you did not set up.
- 4Change the password on any other account that uses the same login, and consider a credit fraud alert or freeze.
DreamHost, a web hosting company and domain registrar, has confirmed a data breach. An attacker got into the system behind its online File Manager and stole the usernames and passwords people use to upload files to their websites. The break-in ran from about August 2026 until the company found it on October 23, 2026.
What happened
The File Manager is a tool that lets customers manage website files from a web browser. DreamHost says an unauthorized person got into the server that runs it, at files.dreamhost.com, by exploiting a flaw in the software. That gave the attacker the FTP and SFTP logins of anyone who used the File Manager during that period. FTP and SFTP are the standard ways to send files to a website.
The company also says the intruder may have reached its webmail systems. For a limited number of users, that could have exposed session information, including credentials. A session is the record that keeps you signed in while you use your email. DreamHost describes the attack as deliberate.
Why it matters
A stolen file transfer login can let someone change a website without the owner knowing. That could mean adding harmful content or altering pages. Access to webmail raises a different risk. An attacker could read messages or set up rules that quietly forward mail elsewhere. People who reuse one password on several accounts face extra risk, because a stolen password can be tried elsewhere.
Who can relax a little
DreamHost says it found no evidence that the attacker reached control panel login information or customer billing and payment details. An outside provider handles payments. That is reassuring, but it is not a guarantee, and the investigation may not be finished. The company says it has blocked the attacker, fixed the flaw, ended active sessions for potentially affected users and invalidated their passwords.
What to do
The alert box above lists the steps. In short, change your passwords, look over your website and email settings, and watch your credit. DreamHost is offering one year of credit monitoring and identity theft protection through Equifax to affected people. It also urges them to consider a fraud alert or a security freeze on their credit report.
What is still unknown
BleepingComputer asked DreamHost several times how many accounts were affected and got no answer. The number of webmail users involved is described only as limited. Until DreamHost shares more, customers who used the File Manager or webmail since August should assume they could be affected.
The takeawayIf your site or email is on DreamHost, change your passwords now and check for changes or forwarding rules you did not set up.