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2 vulnerabilities found for telnyx-mcp by team-telnyx
CVE-2026-81098 (GCVE-0-2026-81098)
Vulnerability from nvd – Published: 2026-08-27 14:50 – Updated: 2026-08-29 11:48
VLAI
EPSS
VEX
Title
Telnyx MCP Server through 6.83.0 Missing Authentication on Streamable HTTP Transport
Summary
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.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 18:47 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/team-telnyx/telnyx-node | product |
| https://github.com/team-telnyx/telnyx-node/pull/450 | issue-trackingpatch |
| https://github.com/team-telnyx/telnyx-node/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/telnyx-mcp-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| team-telnyx | telnyx-mcp |
Affected:
0 , ≤ 6.83.0
(semver)
|
Date Public
2026-08-26 00:00
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CVE-2026-81098 (GCVE-0-2026-81098)
Vulnerability from cvelistv5 – Published: 2026-08-27 14:50 – Updated: 2026-08-29 11:48
VLAI
EPSS
VEX
Title
Telnyx MCP Server through 6.83.0 Missing Authentication on Streamable HTTP Transport
Summary
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.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-27 18:47 UTC
CWE
- CWE-306 - Missing Authentication for Critical Function
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/team-telnyx/telnyx-node | product |
| https://github.com/team-telnyx/telnyx-node/pull/450 | issue-trackingpatch |
| https://github.com/team-telnyx/telnyx-node/securi… | vendor-advisory |
| https://www.vulncheck.com/advisories/telnyx-mcp-s… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| team-telnyx | telnyx-mcp |
Affected:
0 , ≤ 6.83.0
(semver)
|
Date Public
2026-08-26 00:00
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