GMOリサーチ&AI(アンケートサイト「infoQ」)Data breach / unauthorized access incident
- Occurred on
- October 3, 2026
- Announced on
- October 6, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- 948,498 records
- Main impact
- Up to 948,498 member records (name, email, etc.) from the survey monitor site "infoQ" were leaked, and 611 instances totaling 約286万9,500円分 of points were fraudulently exchanged for Amazon gift codes (points will be fully reimbursed).
- Information involved
- Email addressUser / member IDPasswordPhone numberHome addressFull nameDate of birth
- Cause / key point
- Unauthorized third-party access to the member system detected on 10月3日 (credit card information is not retained).
- Industry
- IT & telecom
- Listing / capital
- UnlistedParent company: GMOプロダクトプラットフォーム(東証グロース 3695)
GMOリサーチ&AI is a subsidiary of GMOプロダクトプラットフォーム.
- Last updated
- October 20, 2026
Stock price reaction to the disclosureGMOプロダクトプラットフォーム・親会社 / 東証グロース 3695
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Written & reviewed
Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction
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Attack method classification: Unauthorized access (method undisclosed)(Breached, but the technique was not identified or disclosed)
Read the Unauthorized access (method undisclosed) guide and national trends →