> JapanHacked_
[Contained][Severity: Critical][Credential abuse]

CAMPFIRE: unauthorized access to its GitHub account

CAMPFIRE detected and disclosed unauthorized GitHub access on April 3. Its June 2 investigation traced the attack to an employee's GitHub credentials accidentally uploaded to a personal development server, enabling intrusion into an internal business cloud. Potentially exposed users remained 225,846 after deduplication: 108,784 owner, 118,010 backer, 1,282 partner and 10,521 unclassified bank-detail records, with overlap between categories. Separately, 413 developer name/email records were accessible. No transfer of personal-data files was found, but missing logs prevented ruling out viewing. Card information was excluded. The service platform ran separately, with no misuse or alteration found. Initial containment and authentication/monitoring improvements were completed.

Disclosed

2026-04-03

Organizations involved

2

Leaked or at risk

225.8K

225,846

Downtime

Unknown

Timeline

  1. Detected, Disclosed 2026-04-03
  2. 1 days

Attack or cause

Method
[Credential abuse]
Impact
[Data leak]
Entry point
Unknown

Data exposed or at risk

[Name][Postal address][Phone number][E-mail address][Bank account]

Supply chain

Organizations involved

Open in organization search

Sources

  1. [1][Official]【重要】弊社システムへの不正アクセスによる個人情報漏えい可能性の経緯と対応状況についてCAMPFIRE · 2026-05-11
  2. [2][News]クラファンサイト「CAMPFIRE」、不正アクセスによる個人情報漏えいの可能性、最大22万件超INTERNET Watch · 2026-04-27
  3. [3][Official]【重要】弊社が利用する外部サービスへの不正アクセスによる個人情報漏洩の可能性に関する注意喚起のお知らせYokohama DeNA BayStars Baseball Club · 2026-05-22
  4. [4][Official]不正アクセス事案にかかる調査結果についてCAMPFIRE · 2026-06-02