One Telegram Upload. 824 Records in the Principal.com Leak.

HEROIC analysts identified a combolist labeled "principal.com - 824 emails," uploaded to Telegram in June 2026. The file contains 824 records, each pairing a principal.com email address with a plaintext password and an associated URL.

Why the Principal.com Leak Is Dangerous

Because every record in this list shares the same email domain, an attacker can focus a targeted campaign against principal.com account holders specifically. With 824 working email and plaintext password pairs, that attacker has a ready-made list to attempt direct logins or phishing campaigns tailored to this specific group of users.

What Was Exposed

• Email addresses (principal.com domain)
• Plaintext passwords
• Associated URLs

Why This Matters

Domain-specific leaks like this one are often used for both account takeover and follow-up phishing, since the attacker already knows the target's employer or service affiliation. If your principal.com credentials appear here and you have reused that password anywhere else, the risk extends well beyond a single account.

How This Domain-Specific Combolist Was Built

Combolists organized around a single email domain are typically filtered out of a larger breach or stealer log dataset, isolating just the addresses that match one company or provider. This lets sellers offer a smaller, targeted file, in this case 824 principal.com records, to buyers with a specific interest in that organization's users.

Check If You Are Affected

If you have a principal.com email address, checking your exposure takes only a moment. HEROIC's free breach scanner searches over 400 billion leaked records, including this combolist, so you can confirm whether your credentials were part of this leak and take action if needed.