Saitama Citizens Medical Center: patient photos and staff data exposed through staff-page attachments
Direct access bypassed staff-page permissions, exposing two patient photos and two staff members’ names/phones. Actual leakage or resulting harm is unconfirmed.
Disclosed
2026-09-28
Organizations involved
1
Leaked or at risk
Unknown
Downtime
Unknown
Accessible attachment
Attachments on staff-only pages could be accessed directly without the intended permissions. A Center Manual uploaded on 20 July 2018 contained 2 patient photos and names/phone numbers of 2 staff members. Specific operations could show the patient photos before processing. The image count does not establish the patient count or the total number of people affected. [1]
As of the 28 September notice, no resulting harm was confirmed and actual third-party acquisition was not established. The notice gives neither a remediation completion date nor the date unintended access became possible. This is separate from the lost surgical-image media disclosed on 6 October. [1]
Timeline
- Disclosed 2026-09-28
- 1 days
Attack or cause
- Method
- [Misconfiguration]
- Impact
- [Data leak]
- Entry point
- Web app
Data exposed or at risk
Services hit
Organizations involved
[Breached][Major]Saitama, SaitamaMedical care and welfare
Saitama Citizens Medical Center
Sources
- [1][Official]個人情報漏えいのおそれに関するお知らせとお詫びSaitama Citizens Medical Center · 2026-09-28
- [2][News]手術画像を保存した記録媒体を紛失 - さいたま市民医療センターSecurity NEXT · 2026-11-06