Yokohama Rubber subscriber data leaked in Arara incident
SpilloverSpillover from the Arara incident · View original incident →Unauthorised access to Arara's email distribution service exposed company names and email addresses registered by subscribers to Yokohama Rubber's news releases and email newsletters. Yokohama Rubber was notified of the unauthorised access on 28 October 2026 and suspended email distribution, then received notice on 3 November that its related data had been leaked and issued an announcement.
Key facts
- Affected organisation
- Yokohama Rubber
- Original incident
- Arara email service cyber-attack exposes 81.33 million email addresses
- Incident type
- Data breach
- Occurred / detected
- 2026-11-03
- Scale of damage
- Company names and email addresses of news release and email newsletter subscribers exposed; the official announcement did not disclose the number of records
- Cause / method
- Hacking related to the Arara incident
- Location
- Japan
If your data was exposed
- Don’t tap links in texts, calls or emails that mention this incident and offer compensation, refunds or breach checks. Check directly on the organisation’s official website or app.
Timeline
- The leak of Yokohama Rubber user information as a result of the Arara incident became public.
Original incident
This is spillover from the Arara incident.
Arara email service cyber-attack exposes 81.33 million email addresses
81.3mImpact: 81,329,467 email addresses and some customers' member information
Japan's Arara Message email delivery service was breached through a web server vulnerability, exposing email addresses and some customers' member information. Further investigation put the number of unique email addresses exposed at 81,329,467. The attacker also misused the service to send up to approximately 7.13 million emails impersonating credit card companies, and the company isolated the servers and suspended its email delivery service entirely.
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The summary and key facts are written by AI from related reports and may contain errors. Check the original articles and the organisation’s official statements for accurate details.