4,356,211 Records Exposed in ArtHouse Cloud Combo URL 1 Leak

4,356,211. That is the record count sitting inside a file called ArtHouse Cloud Combo URL 1 uploaded by a Telegram User, uploaded to a Telegram channel in late February 2026. Numbers that large can be hard to picture, but each one represents an email address and password pulled from a real, infected device.

Why This Is Dangerous

A combolist of this size gives attackers enormous reach. Instead of targeting one person, they can run automated tools against millions of accounts at once, checking which logins still work on banking sites, streaming services, and email providers. It is neccessary to understand that scale is the whole point of a combolist like this one, quantity over precision.

What Was Exposed

• 4,356,211 total records
• Email addresses
• Plaintext passwords
• URLs tied to each account

Why This Matters

Because the passwords are in plaintext and paired with URLs, criminals do not have to acheive anything technical to use this data, they can just plug it into automated login tools and let the software do the work. That means millions of people could truely be at risk of having their accounts hijacked without ever knowing this file exists.

How Stealer Logs Work

Combolists like this one are usually built by merging the output of multiple infostealer infections. The malware runs on victim devices, scrapes saved browser credentials, and reports back to whoever is controlling it. Over time, operators combine several of these logs into one giant file, sometimes labeling them by the type of accounts included, which is likely how a file this large came together.

Check If You Are Affected

With millions of records involved, checking your own exposure matters more than usual. HEROIC's free breach scanner searches over 400 billion leaked records to tell you if your email and password have shown up in a leak like this one.