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The GMO single sign-on system stored customer files in a public directory, making them accessible to external parties for nine years.

CybersecurityPrivacyTechnologyNov 2, 2026score 0.402 posts · 0 replies across 1 instances
The thread discusses a data breach involving approximately 45,000 users of a GMO-related single sign-on system. The breach occurred because customer files were stored in a public directory intended for logo images, leaving them accessible for about nine years.

Claims

The GMO single sign-on system stored customer files in a public directory, making them accessible to external parties for nine years.
Parent: CybersecurityEntity: GMO single sign-on systemSub-entity: public directory storageImpact: negativeDate: Nov 2, 2026Target: GMO single sign-on system

Source posts

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ロゴ画像用の公開領域に顧客ファイルも保存　GMO系シングルサインオン、4.5万人分漏えい - ITmedia NEWS https://www.itmedia.co.jp/news/article/2611/02/2000002780/
8 boosts · 0 favs · 0 replies · Nov 2, 2026
@[email protected]
ロゴ画像用の公開領域に顧客ファイルも保存　GMO系シングルサインオン、4.5万人分漏えい - ITmedia NEWS https://www.itmedia.co.jp/news/article/2611/02/2000002780/ 『顧客情報を含む一時ファイルなどを、ロゴ画像と同じ公開領域に保存する設計になっていたことで、約9年間にわたり外部から取得できる状態だった』 ﾀﾞﾐﾀﾞｺﾘｬ!!
0 boosts · 0 favs · 0 replies · Nov 2, 2026