{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "6.83.0"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "96b9fb736e2e4a9871f0aa97c8bbffac9f01fb61"
            }
          ],
          "repo": "https://github.com/team-telnyx/telnyx-node",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-46jp-xr2h-fw7h"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81098.json"
  },
  "details": "The Telnyx MCP server exposed its HTTP transport on every interface and did not require a caller credential. packages/mcp-server/src/http.ts served MCP on the root path with a listener bound to all interfaces and parsed the caller's authentication headers in a mode that did not fail when they were absent, so a request without any credential completed initialisation and dispatched tools. Dispatch forwarded the server's own stored credentials, the Telnyx API key and client secret together with the code-execution key, to the upstream endpoint, so an unauthenticated caller able to reach the port acted with them. The current code defaults the host to loopback, requires a server API key, and enforces it in middleware.",
  "id": "CVE-2026-81098",
  "modified": "2026-08-28T11:30:23.094021911Z",
  "published": "2026-08-27T14:50:38.327Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81098.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/team-telnyx/telnyx-node/security/advisories/GHSA-46jp-xr2h-fw7h"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81098"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/telnyx-mcp-server-through-6.83.0-missing-authentication-on-streamable-http-transport"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/team-telnyx/telnyx-node/pull/450"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/team-telnyx/telnyx-node"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Telnyx MCP Server through 6.83.0 Missing Authentication on Streamable HTTP Transport"
}