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Confirmed

JSEG: 1,644 newslist emails/names leaked via Meruhaikun

After Meruhaikun intrusion, JSEG posted June 22, 2026; later confirmed leakage; Aug 17 final report fixed 1,644 subscribers’ email and name. Vendor-wide totals belong on the vendor root and are not summed here.

Last updated: 2026-11-09

Overview

1,644 people.

Timeline

  1. Occurred
  2. Discovered
  3. Disclosed

Organization response

Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.

What you can do

Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.

Sources

  1. 【重要なお知らせ】ニューズリスト登録メールアドレスおよびお名前の流出に関するお詫びと報告（確報）一般社団法人日本応用地質学会 · 2026-11-09
  2. 【重要なお知らせ】ニューズリスト登録メールアドレス流出に関するお詫びと報告（第二報）一般社団法人日本応用地質学会 · 2026-11-09
  3. 【重要なお知らせ】ニューズリスト登録メールアドレス流出の可能性に関するお詫びと報告（第一報）一般社団法人日本応用地質学会 · 2026-11-09

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