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CVE-2026-54446— NetLicensing MCP Server: Unauthenticated Use of Server-Side NetLicensing API Key in HTTP Mode

Quick assessment

Affected
Labs64 NetLicensing-MCP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NetLicensing MCP Server 是一个自然语言接口，允许代理式应用程序在 Labs64 NetLicensing 中管理软件许可证生命周期。在 0.1.6 版本之前，针对 端点的、网络可达的 HTTP 传输请求，如果未携带 请求头、 请求头以及 查询参数，则会绕过 中的 认证检查。随后， 中的下游 会回退使用操作者的 ，并以操作者账户身份对上游 NetLicensing REST API 进行认证调用。 未经认证的 attackers 可以调用 MCP 工具执行以下操作：枚举产品、许可证、被许可方和

CVSS 8.1 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
Labs64 NetLicensing-MCP < 0.1.6 affected
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I. Basic Information for CVE-2026-54446

Vulnerability Information
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Vulnerability Title
NetLicensing MCP Server: Unauthenticated Use of Server-Side NetLicensing API Key in HTTP Mode
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Labs64 NetLicensing-MCP < 0.1.6 -

II. Public POCs for CVE-2026-54446

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III. Intelligence Information for CVE-2026-54446

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Patches & Fixes for CVE-2026-54446 (1)

Vendor Advisories for CVE-2026-54446 (1)

Vendor Pages for CVE-2026-54446 (1)

IV. Related Vulnerabilities

Same vendor: Labs64
Same weakness: CWE-306

V. Comments for CVE-2026-54446

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