{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "0"
                  },
                  {
                    "fixed": "4.6.5"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StandardRange"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ca7506268c415f1c6f948f635c127b3a2019700d"
            }
          ],
          "repo": "https://github.com/diced/zipline",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-wgjv-p9mm-qw77"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-367"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126937.json"
  },
  "details": "Zipline before 4.6.5 contains a TOCTOU race condition in the POST /api/setup endpoint that allows unauthenticated attackers to create multiple SUPERADMIN accounts by racing concurrent requests before the firstSetup flag is reset. Attackers can send simultaneous requests with spoofed X-Forwarded-For headers during the argon2 hashing window to gain full administrative control of the instance.",
  "id": "CVE-2026-126937",
  "modified": "2026-11-14T02:30:50.090599335Z",
  "published": "2026-11-13T09:34:40.499Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/126xxx/CVE-2026-126937.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/diced/zipline/security/advisories/GHSA-wgjv-p9mm-qw77"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126937"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/zipline-before-4.6.5-toctou-race-condition-via-api-setup"
    }
  ],
  "schema_version": "1.9.2",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Zipline before 4.6.5 TOCTOU Race Condition via /api/setup"
}