{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.0.31"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2b10ae36112ce68deebf910b22505d44efcef552"
            },
            {
              "fixed": "18db02b76e5b7fe253339abb10f927c243f9e683"
            }
          ],
          "repo": "https://github.com/samanhappy/mcphub",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-454m-4vm6-842f"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79746.json"
  },
  "details": "MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.31, when a bearer key with accessType: 'servers' (or 'custom') is used against a group route, isBearerKeyAllowedForRequest grants access to the entire group as long as any single server in that group appears in the key's allowedServers list — not only when every server the key is scoped to matches, and critically, without ever re-checking allowedServers again once the group-level connection is authorized. A key explicitly scoped to one specific server therefore also grants full access to every other server that happens to share a group with it, including servers the key was never authorized for. This issue has been patched in version 1.0.31.",
  "id": "CVE-2026-79746",
  "modified": "2026-09-03T03:30:47.084364618Z",
  "published": "2026-08-31T17:55:43.528Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/samanhappy/mcphub/releases/tag/v1.0.31"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/79xxx/CVE-2026-79746.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/samanhappy/mcphub/security/advisories/GHSA-454m-4vm6-842f"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-79746"
    },
    {
      "type": "FIX",
      "url": "https://github.com/samanhappy/mcphub/commit/2b10ae36112ce68deebf910b22505d44efcef552"
    },
    {
      "type": "FIX",
      "url": "https://github.com/samanhappy/mcphub/pull/1059"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "MCPHub: Server-scoped bearer key gains access to an entire group via partial (any-overlap) server matching"
}