{"apiVersion":"1.0","identifier":"CVE-2026-81098","description":"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.","publishedAt":"2026-08-27T17:20:52","lastModifiedAt":"2026-08-27T20:18:49","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81098","cvssScore":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","epssProbability":0.00505,"riskScore":0.95,"affectedProduct":"Telnyx MCP server","affectedVersions":"unknown","vulnerabilityType":"Library","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-81098","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-81098","en":"https://www.redsauce.net/en/cves/CVE-2026-81098","fr":"https://www.redsauce.net/fr/cves/CVE-2026-81098","pt":"https://www.redsauce.net/pt/cves/CVE-2026-81098","de":"https://www.redsauce.net/de/cves/CVE-2026-81098","sk":"https://www.redsauce.net/sk/cves/CVE-2026-81098","el":"https://www.redsauce.net/el/cves/CVE-2026-81098"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-81098"}}