Maxun < 0.0.42 - Cross-Tenant IDOR in Storage and Webhook API Handlers

{
  "id": "8737d6af0649fe5b347e30ea570adfbf06d60cccc4a0db27f5d8cf983d31d7fa",
  "url": "https://osv.dev/vulnerability/CVE-2026-56767",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Maxun < 0.0.42 - Cross-Tenant IDOR in Storage and Webhook API Handlers",
    "summary": "Maxun before 0.0.42 contains a cross-tenant insecure direct object reference vulnerability in storage and webhook API handlers that allows authenticated users to access other users' robots and OAuth tokens. Attackers can read plaintext Google and Airtable access tokens, modify, delete, or execute other users' robots by bypassing ownership checks in API endpoints.",
    "evidence": "osv:CVE-2026-56767",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-56767",
      "aliases": [
        "CVE-2026-56767"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/getmaxun/maxun",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "50ee9b35cc99719829db3d4197ddd6b7284f734e"
                },
                {
                  "fixed": "11db0257531f1c23dec94727793c9444ee2873cf"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.0.42"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "11db0257531f1c23dec94727793c9444ee2873cf"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.0.41",
            "v0.0.40",
            "v0.0.39",
            "v0.0.38",
            "v0.0.37",
            "v0.0.36",
            "v0.0.35",
            "v0.0.34",
            "v0.0.33",
            "v0.0.32",
            "v0.0.31",
            "v0.0.30",
            "v0.0.29",
            "v0.0.28",
            "v0.0.27",
            "v0.0.26",
            "v0.0.25",
            "v0.0.24",
            "v0.0.23",
            "v0.0.22",
            "v0.0.21",
            "v0.0.19",
            "v0.0.18",
            "v0.0.17",
            "v0.0.16",
            "v0.0.15",
            "v0.0.14",
            "v0.0.13",
            "v0.0.12",
            "v0.0.10",
            "v0.0.7",
            "v0.0.6",
            "v0.0.01"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-56767.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:45.181158344Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56767.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-56767",
        "https://www.vulncheck.com/advisories/maxun-cross-tenant-idor-in-storage-and-webhook-api-handlers",
        "https://github.com/getmaxun/maxun/pull/1088",
        "https://github.com/getmaxun/maxun/commit/11db0257531f1c23dec94727793c9444ee2873cf",
        "https://github.com/getmaxun/maxun",
        "https://github.com/getmaxun/maxun/issues/1079"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/56xxx/CVE-2026-56767.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-56767",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 513365,
  "published_at": "2026-06-25T18:03:33.72+00:00"
}