Overview
Access occurred during March 4–17. Potential information included names, affiliations, addresses, email, phones and transaction/service-use details. The period’s start is not forced into a single leakage date; occurrence is NULL. The entry method and credential theft are not asserted from the notice.
Timeline
- Occurred
- Discovered
- Disclosed
Start of the disclosed access period.
End of the disclosed access period.
Possible exposure disclosed.
Organization response
The company blocked access, reported to relevant authorities, contacted affected parties and continued checking for misuse.
What you can do
Check notices through the organisation’s genuine contact channels. Do not enter credentials or payment details through links in unexpected messages.
Sources
- Chatworkアカウントへの不正アクセスによる漏えい可能性ジャスネットコミュニケーションズ · 2026-11-09