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JAENES
APartial leak confirmedJune 2, 2026 announced

CAMPFIREData 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
April 2, 2026
Announced on
June 2, 2026
Severity
AFinancial and HR records — information that easily translates into monetary damage.
Scale
225,846 accounts
Main impact
Approximately 22.6万 users were affected, including some bank account information. One personal information record was confirmed to have been exfiltrated.
Information involved
Card & payment data
Cause / key point
Unauthorized access to the cloud environment originating from the leakage of GitHub credentials.About Abuse of credentials
Industry
IT & telecom
Listing / capital
Unlisted
Sources
Last updated
October 20, 2026
Card & payment dataHow severity is assessed →

Is this incident worth paying attention to?

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)

Read the Abuse of credentials guide and national trends →

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