调查中

Monteroza: newsletter member data may have leaked via Arara breach (625,429 email addresses)

Monteroza learned on November 2 that newsletter members' personal data may have leaked through unauthorised access to its vendor Arara's servers.

最后更新: 2026-11-09

此内容以 English 显示。

概述

The vendor reported 625,429 email addresses, of which 31,333 include optional birth date, gender, prefecture and similar fields (a subset). The cause was given as a web-server vulnerability in the vendor environment. Per the company, this stems from unauthorised access to the Arara email-delivery platform (recorded separately); this figure is a subset of the vendor scope and must not be added to it.

时间线

未知发生
未知发现
2026-11-04披露

组织应对措施

Suspended newsletter sign-ups and delivery.

用户应对建议

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.

信息来源

委託先のメール配信サービスへの不正アクセスによる個人情報漏えいに関するお詫びとご報告株式会社モンテローザ · 2026-11-09