@payloadcms/plugin-multi-tenant has a cross-tenant create issue

{
  "id": "3cf435bb4944684a929fc0a8b661f812007b758b9736a9a4bca5054fc5191e46",
  "url": "https://osv.dev/vulnerability/GHSA-xhm9-gwgw-3q2q",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "@payloadcms/plugin-multi-tenant has a cross-tenant create issue",
    "summary": "### Impact An authenticated user limited to one tenant could create a record in another tenant. This requires the multi-tenant plugin with at least one tenant-enabled collection. Reads and direct edits to an existing target-tenant document were not bypassed. You are affected if: - You are using @payloadcms/plugin-multi-tenant ### Patches Users should upgrade Payload packages to `>= 3.90.0` or `>= 4.0.0-canary.34`. ### Workarounds You can add access control with `accessResultOverride` on the multi-tenant collection config to ensure a user has access to the tenant before creating.",
    "evidence": "osv:GHSA-xhm9-gwgw-3q2q",
    "products": [
      {
        "name": {
          "value": "@payloadcms/plugin-multi-tenant",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.90.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      },
      {
        "name": {
          "value": "@payloadcms/plugin-multi-tenant",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "4.0.0-canary.34",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "GHSA-xhm9-gwgw-3q2q",
      "aliases": [
        "CVE-2026-105864",
        "GHSA-xhm9-gwgw-3q2q"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.90.0"
                }
              ]
            }
          ],
          "package": {
            "name": "@payloadcms/plugin-multi-tenant",
            "purl": "pkg:npm/%40payloadcms/plugin-multi-tenant",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-xhm9-gwgw-3q2q/GHSA-xhm9-gwgw-3q2q.json"
          }
        },
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "4.0.0-canary.0"
                },
                {
                  "fixed": "4.0.0-canary.34"
                }
              ]
            }
          ],
          "package": {
            "name": "@payloadcms/plugin-multi-tenant",
            "purl": "pkg:npm/%40payloadcms/plugin-multi-tenant",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-xhm9-gwgw-3q2q/GHSA-xhm9-gwgw-3q2q.json"
          }
        }
      ],
      "modified": "2026-10-07T20:45:07.236890143Z",
      "provider": "osv",
      "references": [
        "https://github.com/payloadcms/payload/security/advisories/GHSA-xhm9-gwgw-3q2q",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105864",
        "https://github.com/payloadcms/payload/commit/b8fc06a18afb6974dc07f95ac1e541c716e5926b",
        "https://github.com/payloadcms/payload",
        "https://github.com/payloadcms/payload/releases/tag/v3.90.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "severity": "MODERATE",
        "github_reviewed": true,
        "nvd_published_at": "2026-10-06T17:17:22Z",
        "github_reviewed_at": "2026-10-07T20:29:27Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105864",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 97275,
  "published_at": "2026-10-07T20:29:27+00:00"
}