Someone Could Be Logging In: The 'Mix Fresh B4_Jx' Telegram Leak

In April 2026, HEROIC analysts spotted a combolist labeled "Mix Fresh B4_Jx" that a Telegram user uploaded to a public channel on April 5. The file is small compared to major corporate breaches, containing 260 records tied to accounts in the United States, but it still bundles email addresses, plaintext passwords, and the URLs where each login was used into one ready-to-use package. Why a Small List Like This Still Carries Real Risk Size does not make a combolist safe to ignore. Every password in this file sits in plain, readable text, so whoever downloads it can log in immediately without cracking anything. Because each credential is paired with the URL it came from, an attacker knows exactly which site or app to target, which turns a scattered list of 260 accounts into 260 specific, actionable attack attempts. What Was Exposed Email addresses Plaintext passwords, stored in readable, unencrypted form URLs identifying where each login was used Why This Matters Even at a Small Scale A combolist this size is often used for targeted credential stuffing, where an attacker runs each email and password pair against banking apps, email accounts, and social media logins to see what still works. If you reused this password anywhere else, those accounts are exposed too. A single successful login can open the door to account takeover, financial fraud, or identity theft if personal information is stored behind that login. How a Telegram Combolist Like "Mix Fresh B4_Jx" Gets Made Combolists are compiled lists of email or username and password pairs, often pulled together from older leaks, malware infections, or manual scraping, then repackaged and shared as a single file. Telegram channels have become a popular way to distribute these lists because they are quick to post, easy to find, and hard to trace back to a single source. Check If Your Email Was Part of This Leak If you had an account tied to the United States, it is worth checking whether your credentials showed up in this list. HEROIC's free breach scanner checks your email against a database of more than 400 billion exposed records, including small combolists like this one, so you can find out quickly and update any passwords that need it.