吉野家・はなまる（ApplyNow）Data breach / unauthorized access incident
- Occurred on
- September 7, 2026
- Announced on
- September 30, 2026
- Severity
- BIncidents centered on names and contact details.
- Scale
- 418 accounts
- Main impact
- It has been confirmed that attribute data of 5,366 applicants and encrypted passwords for 418 recruiter accounts were leaked. Interview videos were excluded.
- Information involved
- Email addressPasswordHome addressFull nameDate of birth
- Cause / key point
- Unauthorized access exploiting a vulnerability in a data analysis tool.About Exploitation of vulnerabilities
- Industry
- Food & dining
- Listing / capital
- Listed company東証プライム 9861(吉野家ホールディングス)
吉野家 and はなまる are brands of 吉野家ホールディングス.
- Last updated
- October 20, 2026
Stock price reaction to the disclosure吉野家ホールディングス / 東証プライム 9861
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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: Exploitation of vulnerabilities(Breaking in through holes in software and devices)
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