LegionProxy data breach: 10K accounts exposed
Severity: high · Patch status: no-fix-needed · Since 2026-05-06
In April 2026, the commercial residential and ISP proxy network LegionProxy suffered a data breach. The incident exposed 10k email addresses, bcrypt password hashes, names and purchases. Exposed data: email addresses, names, passwords, purchases. The breach dates from Apr 6, 2026; Have I Been Pwned loaded it on May 6, 2026.
What to do
- If you had a LegionProxy account, change its password and the password of any other account that reused it.
- Turn on multi-factor authentication wherever it is offered.
- Check whether your addresses are in this breach at https://haveibeenpwned.com.
- Expect targeted phishing that quotes the leaked details; verify any unexpected contact out of band.
Sources
All live incidents on Threat Watch