If You Reuse Passwords, the Mix TXTVALID Leak Should Worry You

In April 2026, HEROIC analysts identified a stealer log labeled "Mix TXTVALID" circulating on Telegram. The file contained 1,980 records, each pairing an email address with a plaintext password and the login URL it was used on, drawn from a mix of different sites rather than one company.

Why This Is Dangerous

If you reuse the same password across multiple accounts, files like this one are exactly what puts you at risk. Every record already contains a working email, password, and the site it unlocks, so attackers don't need to crack anything, they just need you to have used that password somewhere else too.

What Was Exposed

• Email addresses used across a mix of different online accounts
• Plaintext passwords stored without encryption
• Login URLs showing exactly which site each password unlocks

Why This Matters

Because this file mixes credentials from many different sites, it's a ready-made tool for credential stuffing. If your email and password appear here and you've reused that password anywhere else, you're exposed to account takeover on accounts that have nothing to do with the original leak.

How the Mix TXTVALID File Was Built

Stealer malware quietly copies saved browser passwords and their matching URLs from infected devices, then sends the data back to whoever controls it. A "TXTVALID" label typically means the list has been checked to confirm the logins still work, making this kind of file especially valuable to attackers.

Check If You Are Affected

If you've ever reused a password, it's worth finding out whether it's already circulating in a leak like this one. HEROIC's free breach scanner checks your email against more than 400 billion leaked records, so you know exactly where you stand.