Payload: Improper access control for MCP API keys

{
  "id": "c705ef1bda1a4e7002396055aaf8aae6be70e0f237bdee2e8cf81d70c39b1890",
  "url": "https://osv.dev/vulnerability/CVE-2026-105806",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Payload: Improper access control for MCP API keys",
    "summary": "Payload is a free and open source headless content management system. In @payloadcms/plugin-mcp versions from 3.61.0 until 3.88.0, an authenticated user can manage MCP API keys outside the intended account, enabling privilege escalation through account takeover. This issue is fixed in version 3.88.0.",
    "evidence": "osv:CVE-2026-105806",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-105806",
      "aliases": [
        "CVE-2026-105806",
        "GHSA-2q76-m6w6-qgc6"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/payloadcms/payload",
              "type": "GIT",
              "events": [
                {
                  "introduced": "32479f2705f7c3a04ebd7d0b07eadacc16c3a90c"
                },
                {
                  "fixed": "fea6f8a47a50ff1330d8a5071b43e7dcffb97b22"
                },
                {
                  "fixed": "025581d8c5ed836039ad85397288a30f0d3c11c1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.61.0"
                      },
                      {
                        "fixed": "3.88.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "025581d8c5ed836039ad85397288a30f0d3c11c1"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "fea6f8a47a50ff1330d8a5071b43e7dcffb97b22"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.88.0"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.87.1",
            "v3.87.0",
            "v3.86.0",
            "v3.85.2",
            "v3.85.1",
            "v3.85.0",
            "v3.84.1",
            "v3.84.0",
            "v3.83.0",
            "v3.82.1",
            "v3.82.0",
            "v3.81.0",
            "v3.80.0",
            "v3.79.1",
            "v3.79.0",
            "v3.78.0",
            "v3.77.0",
            "v3.76.1",
            "v3.76.0",
            "v3.75.0",
            "v3.74.0",
            "v3.73.0",
            "v3.72.0",
            "v3.71.1",
            "v3.71.0",
            "v3.70.0",
            "v3.69.0",
            "v3.68.5",
            "v3.68.4",
            "v3.68.3",
            "v3.68.2",
            "v3.68.1",
            "v3.68.0",
            "v3.67.0",
            "v3.66.0",
            "v3.65.0",
            "v3.64.0",
            "v3.63.0",
            "v3.62.0",
            "v3.61.1",
            "v3.61.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105806.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.788088127Z",
      "provider": "osv",
      "references": [
        "https://github.com/payloadcms/payload/releases/tag/v3.88.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105806.json",
        "https://github.com/payloadcms/payload/security/advisories/GHSA-2q76-m6w6-qgc6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105806",
        "https://github.com/payloadcms/payload/commit/025581d8c5ed836039ad85397288a30f0d3c11c1"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105806.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105806",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 500945,
  "published_at": "2026-10-06T15:35:17.028+00:00"
}