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JAENES
SLeak confirmedOctober 21, 2026 announced

PingCAPData breach / unauthorized access incident

笹尾 祐太朗の写真Reviewed by Yutaro SasaoWritten by Leak Watch editorial team published ・ updated
Occurred on
September 9, 2026
Announced on
October 21, 2026
Severity
SCompromise of deep personal data or usable credentials.
Scale
50,000 people
Main impact
Unauthorized use of credentials by a third party led to data being copied from internal systems, resulting in the leakage of up to approximately 50,000 personal records in Japan, including names, email addresses, phone numbers, and transaction-related information.
Information involved
Email addressFull namePhone numberPasswordAuth token
Cause / key point
Data copies were obtained through unauthorized access using account credentials that a third party had illegally acquired.About Abuse of credentials
Industry
IT & telecom
Listing / capital
Unlisted
Sources
Last updated
October 22, 2026
Email addressFull namePhone numberPasswordAuth tokenHow severity is assessed →

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Written & reviewed

笹尾 祐太朗の写真

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: Abuse of credentials(Logging in legitimately with leaked or guessed passwords)

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