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Confirmed

GMO GlobalSign: Trust Login storage misconfiguration let third parties obtain data on 45,030 people

Customer files sat on a publicly listable storage area from ~Nov 2017. Reported Sep 14, 2026; first notice Sep 16. Third notice (Oct 30) fixed timeline/counts to 2,492 organisations / 45,030 people (deduped emails). Passwords/MFA/cards out of scope. First disclosure remains Sep 16.

Last updated: 2026-11-09

Overview

45,030 people (third-notice confirmed figure).

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】GMOトラスト・ログインにおけるお客様情報の漏えいに関するお詫びとお知らせ（第三報）GMOグローバルサイン株式会社 · 2026-11-09
  2. 【重要】GMOトラスト・ログインにおけるお客様情報の漏えいに関するお知らせとお詫び（第一報）GMOグローバルサイン株式会社 · 2026-11-09

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