CVE Watch27 ago 2026

CVE-2026-81098

The Telnyx MCP server exposed its HTTP transport on every interface and did not require a caller credential. packages/mcp-server/src/http.ts

CVSS

9.1

Crítico

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 27 ago 2026 · Última mod.: 27 ago 2026 · CWE-306

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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.

Referencias oficiales

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