mcp-from-openapi 2.2.0 before 2.9.0 SSRF blockedHosts Bypass via Trailing-Dot Hostname

{
  "id": "b1fe3428a054f853e85a8baf3b1ec6e92363e0f1a5d2f6242a75fa62d9b57243",
  "url": "https://osv.dev/vulnerability/CVE-2026-115751",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "mcp-from-openapi 2.2.0 before 2.9.0 SSRF blockedHosts Bypass via Trailing-Dot Hostname",
    "summary": "Agentfront mcp-from-openapi from 2.2.0 before 2.9.0 contains a server-side request forgery vulnerability that allows attackers to bypass the ssrf.blockedHosts denylist using trailing-dot hostnames. Attackers who control an OpenAPI spec URL or redirect target can append a root dot to a blocked hostname to fetch content from operator-blocked hosts.",
    "evidence": "osv:CVE-2026-115751",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-115751",
      "aliases": [
        "CVE-2026-115750",
        "CVE-2026-115751",
        "GHSA-ff5q-5r4v-fw4v"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/agentfront/mcp-from-openapi",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4e888d7f956ad6897620b0bf275ec18b9649307f"
                },
                {
                  "fixed": "8e46e6596dc4de98de63243d10f390b82ef49061"
                },
                {
                  "fixed": "47fb7a655de33958b0c923490ab244343eb5fc44"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.2.0"
                      },
                      {
                        "fixed": "2.9.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "47fb7a655de33958b0c923490ab244343eb5fc44"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8e46e6596dc4de98de63243d10f390b82ef49061"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.9.0"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-115751.json"
          }
        }
      ],
      "modified": "2026-10-31T02:31:04.068960638Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115751.json",
        "https://github.com/agentfront/mcp-from-openapi/releases/tag/v2.9.0",
        "https://github.com/agentfront/mcp-from-openapi/security/advisories/GHSA-ff5q-5r4v-fw4v",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-115751",
        "https://www.vulncheck.com/advisories/mcp-from-openapi-2.2.0-before-2.9.0-ssrf-blockedhosts-bypass-via-trailing-dot-hostname",
        "https://github.com/agentfront/mcp-from-openapi/commit/47fb7a655de33958b0c923490ab244343eb5fc44",
        "https://github.com/agentfront/mcp-from-openapi/pull/42",
        "https://github.com/agentfront/mcp-from-openapi"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-184"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/115xxx/CVE-2026-115751.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-115750",
        "evidence": "/aliases"
      },
      {
        "value": "CVE-2026-115751",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494375,
  "published_at": "2026-10-23T13:03:33.492+00:00"
}