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Reported breach

GMO subsidiary data breach

JPJapan · GMO子会社

産経ニュース reported a data breach at GMO subsidiary (Japan) on 1 November 2026. It affected 45,000 people.

People affected
45,000people
Reported
1 November 2026News report

What was exposed 1

  • ID management service data

How it happened

How
Data left open (misconfiguration) Configuration error source
Our translation from Japanese設定ミス

Sources 1

News reports are read by an AI model; every fact taken from an article was checked word for word against it, and anything it could not find was dropped. · Corrections and changes

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From the data breach tracker: official notices, breach databases and the news, every fact with its source. Open data (CC BY 4.0) · How the tracker works · Official registers · Corrections and changes · Found a mistake? Tell us and we correct it.