Japan's Cyber Security Cloud says a tip from an external organization revealed that one employee's work GitHub credential had leaked, and on Nov 5 access logs showed suspicious past access apparently by a third party using it [1]. The company says some customer information stored on GitHub (company names, names, email addresses, etc.) and service-related communication data may have been viewed or taken, while no unauthorized access to its services or secondary damage has been found and services continue normally [1]. What to do now: the company will notify customers confirmed to be affected and work with clients on notifications for personal data it processes on their behalf, so customers should watch for individual notices [1].
Security vendor Cyber Security Cloud: leaked employee GitHub credential abused, some customer data may be exposed
1 min read
- Disclosed
- Nov 12, 2026
- Published
- Nov 13, 2026
- Last updated
- Nov 13, 2026
- CVSS basis
- Our assessment
- Technology
- Attack vector
- Impact
- Data type
- Actor type
- Motivation
On this page
30-second summary
What happened
Who is affected
Industries mainly affected: Technology
What to do nowOur advice
- Watch for individual notices from Cyber Security Cloud to affected customers [1].
- If your organization entrusts personal data to the company, coordinate with it on notifying data subjects .
Timeline
Technical details
References
Official / primary1
- [1]株式会社サイバーセキュリティクラウド2026-11-12Accessed 2026-11-13Snapshot 2026-11-13 sha256 d6c49218d410
“外部機関からの情報提供により、当社従業員が業務で使用していたGitHubの認証情報1件が外部に流出していたことが判明しました。”
Media1
- [2]
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