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Elasticsearch Instance of Sales Leads on AWS Data Breach

Understand what this public breach record reports and choose next steps based on the information involved.

Breach date: October 29, 20185,788,169 affected accounts in the record
01

What happened?

In October 2018, security researcher Bob Diachenko identified multiple exposed databases with hundreds of millions of records . One of those datasets was an Elasticsearch instance on AWS containing sales lead data and 5.8M unique email addresses. The data contained information relating to individuals and the companies they worked for including their names, email addresses and company name and contact information. Despite best efforts, it was not possible to identify the owner of the data hence this breach as been titled "Elasticsearch Sales Leads".

02

When did it happen?

The breach date in the public record is October 29, 2018. The record was added to the catalogue on November 17, 2018 and last updated there on November 18, 2018.

03

What information was reported as exposed?

  • Email addresses
  • Employers
  • Names
  • Physical addresses

These are incident-level categories. The record does not prove that every category was exposed for every affected person.

04

Who may be affected?

This record may be relevant to people who had an account or other relationship with Elasticsearch Instance of Sales Leads on AWS around October 29, 2018. A catalogue entry does not establish that every customer was affected or that every listed data category applied to each person. Compare the record with an official notice addressed to you.

05

What should you do?

Verify whether the notice applies to you

Compare the organization, dates, and information categories with any notice you received. Use contact details you independently confirm.

Protect identity information

Review your credit reports and consider a free credit freeze if identity information could support new-account fraud.

Expect targeted phishing

Treat unexpected breach follow-ups with caution. Do not use links or phone numbers in a suspicious message; contact the organization directly.

Choose actions that match the information involved. If you find signs that someone is using your identity, the Federal Trade Commission provides a personal recovery plan at IdentityTheft.gov.

Sources and review information

Page reviewed September 14, 2026 by the Data Breach Help Editorial Team. Catalogue details reflect the provider record and may change.