Yahoo Hit: COMBOLIST 1M YAHOO FRESH 100 uploaded by a Telegram User

In December 2025, HEROIC analysts identified a combolist posted to Telegram under the name "COMBOLIST 1M YAHOO FRESH 100," containing 1,067,824 exposed records. Every record targets a Yahoo email address, paired with a plaintext password and the login URL it was captured from, the kind of narrow, single-provider targeting that makes a combolist especially efficient for attackers.

Who This Leak Targets

Unlike a general breach that mixes accounts from many services, this file was built specifically around Yahoo users. That focus means an attacker does not waste time sorting through unrelated accounts, every single record here is a Yahoo login, tested and labeled fresh, ready to be used against Yahoo Mail or any other service tied to that email address.

What Was Exposed

• Yahoo email addresses
• Plaintext passwords
• Login URLs tied to each credential pair

Why This Matters

With over a million confirmed Yahoo logins in a single file, this list is built for large-scale credential stuffing, automated attempts to reuse these email and password combinations across banking, shopping, and other accounts. Anyone caught in this leak faces a real risk of account takeover, and because email accounts are often used to reset other passwords, a compromised Yahoo login can quickly lead to identity theft or financial fraud across multiple services.

How a Single-Provider Combolist Like This Is Built

Criminals often take a large, mixed stealer log or combolist and filter it down to accounts from one specific email provider, since buyers frequently want to target users of a particular service. Each Yahoo login is checked to confirm it still works before being labeled "fresh" and sold or shared, which is how a raw pool of stolen credentials becomes a focused, ready-to-use list of over one million Yahoo accounts.

Check If You're Affected

If you use a Yahoo email account, it is worth checking whether your login is part of this leak. HEROIC's free breach scanner searches a database of more than 400 billion leaked records, so you can see your exposure in seconds and change your password before someone else logs in first.