Inside the ‘Valid’ Combolist: How 419 US Logins Ended Up on Telegram

The "Valid" Combolist: 419 US Logins Surface on Telegram

In February 2026, HEROIC analysts identified a combolist labeled "valid" that had been uploaded to a Telegram channel. The file contained 419 records combining email addresses, plaintext passwords, and the URLs of the accounts they belong to, tied to United States users.

Why a Combolist Called "Valid" Is Dangerous Even at 419 Records

Size is not the only measure of risk. Every password in this file is stored in plaintext, and the label "valid" signals that these logins have already been checked and confirmed to work. That means an attacker does not need to guess or crack anything: the paired URLs point straight to the account each login unlocks, so someone could start logging in immediately.

What Was Exposed in the 419-Record "Valid" File

• Email addresses
• Plaintext passwords
• URLs tied to each login

Why a Small Leak Like This Still Matters

A file of 419 confirmed working logins is more than enough for credential stuffing, where attackers run each pair against other popular sites hoping for password reuse. If even a handful of these 419 people used the same password elsewhere, those accounts can be taken over too, opening the door to identity theft and financial fraud well beyond the original 419 records.

How Combolist Leaks Like "Valid" Actually Get Built

A combolist starts as raw login data pulled from older breaches, stealer malware, or phishing pages. Before it is shared, whoever compiled it often runs the logins through a checker tool that tests each pair against the real site, sorting out the ones that still work. Files marked "valid," like this one, have already passed that check, which is exactly why they are more dangerous than an unverified dump of the same size. Once sorted, the working logins are packaged up and posted to Telegram channels for anyone to grab.

Check If Your Login Was Part of the "Valid" Combolist

Because this file was specifically checked for working logins, it is worth confirming whether your email address is among the 419 records. HEROIC's free breach scanner checks your information against a database of more than 400 billion leaked records, so you can find out quickly and change any passwords that are still in use.