ogx 1.3.1 Server-Side Request Forgery via MCP tool server_url

{
  "id": "7d27759c44927e459d0c10d331e98bf4cb3cb2ad7800105f6a6404892a5e1055",
  "url": "https://osv.dev/vulnerability/CVE-2026-85666",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ogx 1.3.1 Server-Side Request Forgery via MCP tool server_url",
    "summary": "OGX (formerly Llama Stack, affected at commit fbe8e0f) contains an unauthenticated server-side request forgery vulnerability in the OpenAI-compatible POST /v1/responses endpoint. MCP tool definitions accept a server_url parameter (along with headers and authorization values) that is fetched server-side without destination validation; the existing validate_url_not_private() guard used for other URL inputs is not applied to server_url. On the default starter configuration, which runs without authentication, a remote unauthenticated attacker can cause the server to open connections to arbitrary internal addresses (including cloud metadata endpoints such as http://169.254.169.254/) and forward attacker-supplied headers and bearer tokens to those destinations.",
    "evidence": "osv:CVE-2026-85666",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-85666",
      "aliases": [
        "CVE-2026-85666"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ogx-ai/ogx",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "c61c3a2c2bc410d21ed3fc44228c3a976b0cc7b1"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.3.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "fbe8e0f"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.1-dev",
            "v1.2.1-dev",
            "v0.5.5-dev",
            "v0.5.4-dev",
            "v1.1.4-dev",
            "v1.1.3-dev",
            "v1.1.2-dev",
            "v1.1.1-dev",
            "v0.7.3-dev",
            "v1.0.3-dev",
            "v1.0.2-dev",
            "v1.0.1-dev",
            "v0.8.1-dev",
            "v0.7.2-dev",
            "v0.7.1-dev",
            "v0.6.2-dev",
            "v0.6.1-dev",
            "v0.5.3-dev",
            "v0.5.0-dev",
            "v0.2.1",
            "v0.2.0",
            "v0.1.4rc2",
            "v0.1.4rc1",
            "v0.1.3",
            "v0.1.3rc3",
            "v0.1.3rc2",
            "v0.1.3rc1",
            "v0.1.2",
            "v0.1.2rc4",
            "v0.1.2rc3",
            "v0.1.2rc1",
            "v0.1.1",
            "v0.1.1rc4",
            "v0.1.1rc3",
            "v0.1.0",
            "v0.1.0rc12",
            "v0.1.0rc11",
            "v0.0.63",
            "v0.0.62",
            "v0.0.61",
            "v0.0.55",
            "v0.0.54",
            "stable",
            "v0.0.53"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-85666.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.481423178Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85666.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-85666",
        "https://www.vulncheck.com/advisories/ogx-1.3.1-server-side-request-forgery-via-mcp-tool-server-url",
        "https://github.com/ogx-ai/ogx/issues/6287",
        "https://github.com/ogx-ai/ogx",
        "https://github.com/ogx-ai/ogx/blob/v1.3.1/src/ogx/providers/utils/tools/mcp.py"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/85xxx/CVE-2026-85666.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-85666",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493898,
  "published_at": "2026-09-04T14:32:22.307+00:00"
}