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CVE-2026-54446

NetLicensing MCP Server: Unauthenticated Use of Server-Side NetLicensing API Key in HTTP Mode

CVSS 3.1 8.1 HIGHCheck source for fixed versionsKEV status unknown

Original advisory

cve-program · CVE-2026-54446

Published

NetLicensing MCP Server is a natural-language interface that enables agentic applications to manage the software-licensing lifecycle in Labs64 NetLicensing. Prior to 0.1.6, network-reachable HTTP transport requests to /mcp that omit x-netlicensing-api-key, Authorization: Bearer, and the apikey query parameter pass through ApiKeyMiddleware in src/netlicensing_mcp/server.py without authentication. The downstream api_key_ctx in src/netlicensing_mcp/client.py then falls back to the operator's NETLICENSING_API_KEY and authenticates upstream NetLicensing REST API calls under the operator account. An unauthenticated attacker can invoke MCP tools to enumerate products, licenses, licensees, and transactions, create or modify licensing objects, perform validations, and execute destructive delete operations. The issue affects HTTP deployments configured with a server-side key and does not require user interaction. This issue is fixed in version 0.1.6.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-54446

Published

NetLicensing-MCP

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Labs64",
                    "product": "NetLicensing-MCP",
                    "versions": [
                        {
                            "version": "< 0.1.6",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON