Studio（クラウド環境）Data breach / unauthorized access incident
- Occurred on
- September 30, 2026
- Announced on
- October 16, 2026
- Severity
- SCompromise of deep personal data or usable credentials.
- Scale
- Unknown
- Main impact
- There is a risk that account information, created content, form submissions, API keys, etc. for all registered Studio users were leaked, and because the decryption key was also read, whether data was actually obtained and the number of records are undetermined.
- Information involved
- Email addressPasswordAuth token
- Cause / key point
- Cause is under investigation.
- Industry
- IT & telecom
- Listing / capital
- Unlisted
- Last updated
- October 20, 2026
Is this incident worth paying attention to?
Written & reviewed
Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.
CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.
Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:
Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction
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Attack method classification: Under investigation / not stated(Cause not disclosed)
Read the Under investigation / not stated guide and national trends →