The Interia.pl Combolist Quietly Surfaced With 21,993 Logins

HEROIC analysts found a combolist tied to interia.pl, the Polish web portal and email provider, quietly circulating on a Telegram channel in May 2026. The file contained 21,993 records pairing email addresses with plaintext passwords and the URLs each credential was used on. Why this is dangerous: because the passwords in this file are stored in plaintext, anyone who obtains it can attempt to log in immediately, without needing to crack or decrypt anything first. With nearly 22,000 records included, this gives attackers a sizable pool of working credentials to try. What was exposed: email addresses, plaintext passwords, and associated URLs indicating where each credential was originally used. Why this matters: interia.pl accounts often function as a person's primary email, meaning they can be used to reset passwords on other services. If any of these 21,993 people reused their password elsewhere, attackers can use the same credentials to break into email, banking, or social media accounts through credential stuffing, which can lead to account takeover and identity theft. How combolists like this one work: a combolist bundles usernames or email addresses with passwords, typically gathered from earlier breaches, malware infections, or manual scraping of specific sites, then labeled by source and shared or sold on Telegram channels and dark web forums. Because the credentials are already matched and organized, combolists let attackers automate large batches of login attempts across many services at once. Check if you are affected: if you use an interia.pl email account, it's worth checking whether your information appears in this leak. HEROIC's free breach scanner checks your email address against a database of more than 400 billion leaked records so you can quickly find out and take action if needed.