CVE-2026-81098

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Source
https://cve.org/CVERecord?id=CVE-2026-81098
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81098.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-81098
Aliases
  • GHSA-46jp-xr2h-fw7h
Published
2026-08-27T14:50:38.327Z
Modified
2026-08-28T11:30:23.094021911Z
Severity
  • 9.3 (Critical) CVSS_V4 - 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 CVSS Calculator
Summary
Telnyx MCP Server through 6.83.0 Missing Authentication on Streamable HTTP Transport
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.

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"
}
References

Affected packages

Git / github.com/team-telnyx/telnyx-node

Affected ranges

Type
GIT
Repo
https://github.com/team-telnyx/telnyx-node
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
96b9fb736e2e4a9871f0aa97c8bbffac9f01fb61
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "6.83.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

1.*
1.25.0
1.25.1
1.25.2
1.25.3
1.25.5
v1.*
v1.0.0
v1.1.0
v1.10.0
v1.10.1
v1.10.2
v1.10.3
v1.11.0
v1.12.0
v1.13.1
v1.15.0
v1.16.0
v1.17.0
v1.18.0
v1.2.0
v1.2.1
v1.2.2
v1.2.3
v1.2.4
v1.20.0
v1.21.0
v1.22.0
v1.23.0
v1.26.0
v1.26.1
v1.26.2
v1.27.0
v1.3.0
v1.4.0
v1.5.0
v1.6.0
v1.7.0
v1.7.1
v1.7.2
v1.8.0
v1.9.0
v2.*
v2.0.0
v3.*
v3.0.0
v3.0.0-alpha
v3.1.0
v3.2.0
v3.3.0
v3.3.1
v3.3.2
v3.3.3
v3.4.0
v3.4.1
v3.4.2
v3.5.0
v3.6.0
v3.7.0
v3.8.0
v3.9.0
v3.9.1
v3.9.2
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.1.0
v4.2.0
v4.2.1
v4.3.0
v4.4.0
v4.5.0
v4.5.1
v4.6.0
v5.*
v5.0.0
v5.1.0
v5.10.0
v5.11.0
v5.12.0
v5.13.0
v5.13.1
v5.14.0
v5.15.0
v5.16.0
v5.16.1
v5.17.0
v5.17.1
v5.17.2
v5.18.0
v5.19.0
v5.19.1
v5.2.0
v5.2.1
v5.2.2
v5.20.0
v5.21.0
v5.22.0
v5.23.0
v5.24.0
v5.25.0
v5.25.1
v5.26.0
v5.27.0
v5.28.0
v5.29.0
v5.3.0
v5.30.0
v5.31.0
v5.32.0
v5.33.0
v5.34.0
v5.35.0
v5.36.0
v5.37.0
v5.37.1
v5.38.0
v5.39.0
v5.4.0
v5.40.0
v5.41.0
v5.42.0
v5.43.0
v5.44.0
v5.45.0
v5.46.0
v5.47.0
v5.47.1
v5.48.0
v5.49.0
v5.5.0
v5.50.0
v5.51.0
v5.51.1
v5.52.0
v5.53.0
v5.54.0
v5.55.0
v5.6.0
v5.7.0
v5.7.1
v5.8.0
v5.9.0
v6.*
v6.0.0
v6.1.0
v6.10.0
v6.10.1
v6.10.2
v6.11.0
v6.12.0
v6.13.0
v6.14.0
v6.15.0
v6.16.0
v6.17.0
v6.18.0
v6.19.0
v6.2.0
v6.20.0
v6.21.0
v6.22.0
v6.22.1
v6.23.0
v6.24.0
v6.25.0
v6.26.0
v6.27.0
v6.28.0
v6.29.0
v6.29.1
v6.29.2
v6.29.3
v6.29.4
v6.29.5
v6.29.6
v6.29.7
v6.3.0
v6.30.0
v6.31.0
v6.32.0
v6.33.0
v6.34.0
v6.35.0
v6.36.0
v6.37.0
v6.38.0
v6.39.0
v6.4.0
v6.4.1
v6.40.0
v6.41.0
v6.41.1
v6.42.0
v6.43.0
v6.44.0
v6.45.0
v6.46.0
v6.47.0
v6.48.0
v6.49.0
v6.5.0
v6.50.0
v6.51.0
v6.52.0
v6.53.0
v6.54.0
v6.55.0
v6.55.1
v6.56.0
v6.57.0
v6.58.0
v6.59.0
v6.6.0
v6.6.1
v6.60.0
v6.61.0
v6.62.0
v6.63.0
v6.64.0
v6.65.0
v6.66.0
v6.66.1
v6.66.2
v6.67.0
v6.68.0
v6.69.0
v6.7.0
v6.7.1
v6.70.0
v6.71.0
v6.72.0
v6.73.0
v6.73.1
v6.73.2
v6.74.0
v6.74.1
v6.74.2
v6.8.0
v6.8.1
v6.8.2
v6.83.0
v6.9.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81098.json"