Yandex.ru Leak Exposes 18,685 Logins, Enough for a Small Town

HEROIC analysts uncovered a stealer log posted to Telegram in June 2026 containing 18,685 records connected to yandex.ru accounts, dated June 21, 2026. The file was not the result of a breach at Yandex itself. It was compiled from malware running on individual users' devices, which quietly collected saved logins before an anonymous uploader shared the results publicly. Each record pairs an email address with a plaintext password and the URL the credentials were used on.

Why This Is Dangerous

With 18,685 records in plaintext, roughly the population of a small town, this is not a handful of stray logins. It is a ready-to-use list that anyone can open and immediately start testing against other services, since none of the passwords need to be cracked first.

What Was Exposed

• Email addresses
• Plaintext passwords
• URLs tied to each set of credentials

Why This Matters

Because email and password combinations are frequently reused across multiple sites, a leak of this size gives attackers thousands of chances to break into banking, shopping, or social media accounts through credential stuffing. Anyone whose yandex.ru login appears in this file should assume that password is compromised everywhere else they used it too.

How Stealer Logs Work

Infostealer malware infects a device, usually through a malicious download or phishing link, then harvests every saved password, cookie, and autofill entry from the browser. The stolen data is packaged into a log file and either sold on criminal marketplaces or, as with this 18,685-record file, dumped for free on Telegram channels where anyone can grab a copy.

Check If You Are Affected

Rather than wonder whether your yandex.ru login was part of this leak, you can check directly. HEROIC's free breach scanner searches a database of more than 400 billion exposed records, including stealer logs like this one, so you can find out in seconds and change any password that turns up.