{
  "id": 5076083,
  "title": "Dropbox breach seemingly caused by egregious authentication failure [U]",
  "url": "https://urgent.news/2026/09/02/dropbox-breach-seemingly-caused-by-egregious-authentication-failure-u",
  "topic": "tech",
  "section": "Tech",
  "published": "2026-09-02T11:43:21.000Z",
  "source": {
    "name": "9to5Mac",
    "slug": "9to5mac",
    "url": "https://9to5mac.com/2026/09/02/dropbox-login-breach-seemingly-caused-by-egregious-authentication-failure/"
  },
  "original_language": "en",
  "account": "Multiple Dropbox users have been notified by the company that unauthorized access occurred to their accounts between August 4 and August 21, 2026. While no files were viewed or downloaded, Dropbox issued an email explaining the incident and providing guidance for affected users. The breach stemmed from a single sign-on (SSO) option facilitated through a third-party, Lenovo, that allowed attackers to register a Lenovo ID using a user's email address. Despite Lenovo's email verification process failure, Dropbox failed to authenticate the linked ID prior to allowing access, which is considered a critical oversight. The company has since rectified this flaw and revoked all sessions previously authenticated via Lenovo ID.",
  "summary": "Multiple Dropbox users have been emailed by the cloud storage company to advise them that a security breach saw unauthorised access to their account. Update: the company has said that about 5,000 accounts were compromised, with files downloaded from around 1,500 of them. The root cause appears to be a lack of authentication by Dropbox when attackers created a single sign-on option through a…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}