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JAENES
BPossible leakAugust 5, 2026 announced

一般社団法人共同通信社Data 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
Unconfirmed
Announced on
August 5, 2026
Severity
BIncidents centered on names and contact details.
Scale
6,000 records
Main impact
Following external tips, they confirmed the possibility that staff accounts were misused; the disclosed impact is approximately 6,000 cases.
Information involved
Email addressFull name
Cause / key point
They state that the possibility of staff account misuse was confirmed.
Industry
Media & entertainment
Listing / capital
Non-profit corporation
Sources
Last updated
October 20, 2026
Email addressFull nameHow 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: Under investigation / not stated(Cause not disclosed)

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