Inside the 13K Mix 20.05 Combolist: 13,659 Passwords Leaked

HEROIC threat analysts identified a combolist labeled "13K Mix 20.05" that appeared on Telegram on 20 May 2026. The file contains 13,659 records of email addresses paired with plaintext passwords and account URLs, a mixed batch of credentials bundled together and shared under a filename that simply notes its size and upload date.

Why the 13K Mix 20.05 Leak Is Dangerous

With 13,659 working email and password pairs in plaintext, an attacker does not need to guess or crack anything, they can simply load the file into automated tools and start testing logins across the internet within minutes. The included URLs tell them exactly which site each credential unlocks, making it easy to target banking portals, shopping accounts, or email providers with pinpoint accuracy.

What Was Exposed in the 13K Mix 20.05 Combolist

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

Why a Mixed Combolist Like This Matters

"Mix" files like this one pull credentials from multiple sources into a single list, which means the 13,659 people affected may not even know which original leak their data came from. That anonymity works in the attacker's favor: victims who reused a password on more than one account are exposed to credential stuffing, account takeover, identity theft, and financial fraud without ever seeing the original breach that started it.

How Mixed Combolists Are Assembled

A mix combolist is compiled by combining credential data from several smaller leaks, malware logs, or older breaches into one large file, then labeling it by size and date rather than by source. This makes the data harder to trace back to its origin, but no less dangerous, since every plaintext password inside can still be tested against real accounts the moment the file is shared.

Check If Your Email Is In This Leak

With over 13,000 credentials in circulation from this single file, it is worth confirming whether your email is among them. HEROIC's free breach scanner checks your address against more than 400 billion leaked records, giving you a fast, clear answer and the chance to secure your accounts before this data gets used against you.