Overview
4,101 online volunteer registrants. Confirmed views: 3,477 name/affiliation pages and 18 name/affiliation/phone/email pages (subsets, not added). Count stores the published 4,101.
Timeline
- Occurred
- Discovered
- Disclosed
Organization response
Per the notice, the organisation investigated and contained the incident, notified individuals and offered monitoring or protective resources.
What you can do
Be wary of emails, SMS or calls impersonating the organisation; do not open links or attachments or enter passwords or card details. Change reused passwords on other services.
Sources
- 大阪マラソン2026における個人情報の漏えいについて大阪市 · 2026-11-09
- 個人情報の漏えいについて大阪府 · 2026-11-09