{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "3.3.9"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7a79f4c5d338614058515752abd67e49ee2818bb"
            },
            {
              "fixed": "96cec781dc3e8857a22cb7b2b0adddf27b59748d"
            }
          ],
          "repo": "https://github.com/rargames/4gaboards",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-j2fw-r2gj-hfr3"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-287",
      "CWE-915"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53958.json"
  },
  "details": "4gaBoards is a boards system for realtime project management. Prior to 3.3.9, 4gaBoards allows an authenticated user to modify ssoGoogleId, ssoGoogleEmail, ssoGithubId, ssoGithubUsername, ssoGithubEmail, ssoMicrosoftId, ssoMicrosoftEmail, ssoOidcId, and ssoOidcEmail through PATCH /api/users/:id. The whitelist in server/api/controllers/users/update.js mass assigns these backend-managed identity attributes from user input. An attacker can place a victim's provider identifier on an attacker-controlled account, causing the default lookup in helpers such as server/api/helpers/users/get-create-one-for-github-sso.js to match the victim's first SSO login to the attacker's account before the email-linkage flow runs. The victim is logged into the attacker-controlled account, and projects, boards, or data the victim creates remain accessible through the attacker's original local credentials. This issue is fixed in version 3.3.9.",
  "id": "CVE-2026-53958",
  "modified": "2026-08-21T03:30:15.763578502Z",
  "published": "2026-08-18T21:34:59.454Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/RARgames/4gaBoards/releases/tag/v3.3.9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53958.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/RARgames/4gaBoards/security/advisories/GHSA-j2fw-r2gj-hfr3"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53958"
    },
    {
      "type": "FIX",
      "url": "https://github.com/RARgames/4gaBoards/commit/7a79f4c5d338614058515752abd67e49ee2818bb"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "4gaBoards: SSO Pre-Account Takeover / Hijacking via Mass Assignment"
}