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white-essence-2026 · Disclosed 2026-08-12

ホワイトエッセンス: unauthorized access and impact

A reservation-site vulnerability enabled unauthorized access to the core system. Leakage affects about 1.05 million accounts, including clinic personnel and employees.

Cause unresolved / undisclosed

Outcome: Confirmed breach

Entry path and evidence

  • Reported fact

    A reservation-site vulnerability enabled unauthorized access to the core system.

    [s1]画像本文 §§1-3,6（ブラウザで目視）
  • Reported fact

    Leakage affects about 1.05 million accounts, including clinic personnel and employees.

    [s1]画像本文 §§1-3,6（ブラウザで目視）

Timeline

  1. Disclosure date established by the reviewed notice. [s1]

Reported response

  • Reported fact

    The flaw was addressed, traffic blocking introduced and authentication and permissions reviewed.

    [s1]画像本文 §§1-3,6（ブラウザで目視）

Evidence relevant to prevention

Insufficient evidence

Undisclosed entry or patch timing prevents an avoidability assessment. Inspect privileges, retrieval logs, retention and deployed configuration using the linked rules.

Editorial assessment; not a determination of liability. [s1]

Unknowns and AI involvement

AI involvementUnknown

The reviewed disclosures do not establish attacker use of AI.

The notice does not establish all entry, timing and extraction details; unresolved claims remain unknown.

Sources

  1. [s1] ホワイトエッセンス · Primary source

    ホワイトエッセンス：事故に関する公表資料 ↗

    Reviewed 2026-10-09