{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.3.8"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "484c92d583cfbc6815f96364071bb531ec594bf8"
            },
            {
              "fixed": "32c8471443e2d7530ed617a414c864b17c791ced"
            }
          ],
          "repo": "https://github.com/rargames/4gaboards",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-f3p6-chc6-pc77"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-287",
      "CWE-288"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50191.json"
  },
  "details": "4gaBoards is a boards system for realtime project management. Prior to 3.3.8, 4gaBoards is vulnerable to pre-account takeover when registrationEnabled, localRegistrationEnabled, and ssoRegistrationEnabled are enabled and Google, GitHub, Microsoft, or OIDC SSO is configured. The POST /api/register endpoint permits creation of an unverified local account with a victim's email address, and POST /api/access-tokens permits that account to authenticate while isVerified is false. During the victim's first SSO login, server/api/helpers/users/get-create-one-for-github-sso.js, server/api/helpers/users/get-create-one-for-google-sso.js, server/api/helpers/users/get-create-one-for-microsoft-sso.js, and server/api/helpers/users/get-create-one-for-oidc-sso.js find the attacker-controlled account by email and link the verified SSO identity without confirming ownership of the local account. The attacker can retain local-password access to the linked account and obtain the victim's projects, data, and permissions. This issue is fixed in version 3.3.8.",
  "id": "CVE-2026-50191",
  "modified": "2026-09-11T03:30:40.220469077Z",
  "published": "2026-08-18T21:33:16.270Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/RARgames/4gaBoards/releases/tag/v3.3.8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/50xxx/CVE-2026-50191.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/RARgames/4gaBoards/security/advisories/GHSA-f3p6-chc6-pc77"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-50191"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RARgames/4gaBoards/commit/484c92d583cfbc6815f96364071bb531ec594bf8"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "4gaBoards: Pre-Account Takeover via SSO Email Linkage"
}