Researchers Uncovered 11,469 Stolen Logins in ArtHouse Cloud Logs

Researchers monitoring stolen data marketplaces uncovered a file called "ArtHouse Cloud Logs v1" on May 30, 2026, and after reviewing it, confirmed it held 11,469 separate login records. From the outside, it looked like just another anonymous text file. Once opened, it turned out to be a detailed catalog of email addresses, passwords, and the exact websites each one had unlocked.

Why This Is Dangerous

What researchers found wasn't a random assortment of old, recycled credentials. The structure and freshness of the data suggested it came directly from an active info-stealing operation, meaning the 11,469 credentials inside it were likely still valid at the time the file was uncovered. That freshness is precisely what makes a discovery like this significant rather than routine.

What Was Exposed

• 11,469 email addresses identified during the review of the file
• Plaintext passwords documented alongside each of those addresses
• The login URLs researchers matched to every credential pair

Why This Matters

When researchers uncover a leak like this before it becomes widely known, it creates a short window where getting ahead of the problem is still possible. Anyone whose email turns out to be among the 11,469 has a real chance to change their password before it garuntees an attacker gets there first, but only if they act on the discovery instead of ignoring it.

How Stealer Logs Work

The investigation into this file pointed to the same pattern seen in similar ArtHouse Cloud releases: malware quietly installed on victims' devices, harvesting saved browser credentials over time, then exporting everything collected into a single file once enough data had accumulated. Researchers piece these operations together by tracking the same naming conventions and distribution channels across multiple releases.

Check If You Are Affected

You don't need a research team to find out if you're affected. HEROIC's free scanner checks your email against more than 400 billion leaked records, including discoveries like this one, so you get the same kind of answer researchers would, in under a minute.