Confirmed

Commune Inc.: platform intrusion leaked data on about 307,000 members

Member data leaked during windows on Oct 5–6 and Oct 7, 2026. About 307,000 members (estimate): ~126k with email (incl. ~42k staff/demo) and ~181k without email. 144 accounts had passwords force-reset to temporary values (password secrets themselves not confirmed leaked). No DM/payment data. Not caused by client misconfiguration. Public notice page dated Oct 9.

Last updated: 2026-11-09

Overview

“About 307,000 (estimate)” → blank.

Timeline

UnknownOccurred
2026-10-06Discovered
2026-10-09Disclosed

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

当社サービス「Commune」、「Commune for Work」への不正アクセスによる個人情報の漏えいに関するお詫びとお知らせコミューン株式会社 · 2026-11-09

Commune Inc.: platform intrusion leaked data on about 307,000 members

Overview

Timeline

Organization response

What you can do

Sources

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