青森県（青森びいき）Data breach / unauthorized access incident
- Occurred on
- October 6, 2026
- Announced on
- October 8, 2026
- Severity
- AFinancial and HR records — information that easily translates into monetary damage.
- Scale
- 2,950 people
- Main impact
- Unauthorized access to Commune confirmed to have viewed some member information. Up to 2,950 people may be affected; item-by-item ranges are under investigation so details are unconfirmed, and the service is suspended.
- Information involved
- Email addressUser / member IDFull name
- Cause / key point
- Unauthorized access exploiting a vulnerability in the contracted system "Commune".About Supply chain attacks (via vendors & shared services)
- Industry
- Government & municipal
- Listing / capital
- Government / public body
Aomori Prefecture (municipality)
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
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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
Related incidents
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Incidents where the damage spread through the same service or system.
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Same attack method
- S第一興商（ビッグエコー等）2026.10.08 announced・Affected 8,631,000 records
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Same industry
- S市立岸和田市民病院（患者書類）2026.10.16 announced・Affected 1 people
- S大崎地域広域行政事務組合消防本部（NET119・119RAIDEN）2026.10.14 announced・Affected 45 people
- S神奈川県警（使用済み運転免許証）2026.10.09 announced・Affected 30 records
- S長崎市（マイナンバーカード特急発行書類の紛失）2026.09.08 announced・Affected 4 people
- S村田製作所2026.04.27 announced・Affected 73,000 records
- S静岡市2026.01.30 announced・Affected 3,950 people
Attack method classification: Supply chain attacks (via vendors & shared services)(Compromising the provider instead of the user)
Read the Supply chain attacks (via vendors & shared services) guide and national trends →