CVE-2026-54446

HighCVSS 8.1

Published: 17/09/2026(UTC)Updated: 30/09/2026(UTC)Translated: 18/09/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.62%

48th percentile - higher than 48% of all known CVEs

Summary

In NetLicensing MCP Server prior to 0.1.6, HTTP requests to /mcp that omit API key credentials pass through ApiKeyMiddleware without authentication. The downstream context then falls back to the operator's API key, allowing an unauthenticated attacker to invoke MCP tools and perform operations on licensing objects, including destructive deletes.

Risk Assessment

An unauthenticated attacker can enumerate products, licenses, and transactions and create, modify, or delete licensing objects under the operator account. This can lead to serious integrity and availability breaches of the licensing system.

Recommendation

Update NetLicensing MCP Server to version 0.1.6 or later. Until then, restrict network access to the /mcp endpoint and verify authentication configuration.

Other vulnerabilities in NetLicensing MCP Server

CVE-2026-57496Critical
NetLicensing MCP Server is a natural-language interface that enables agentic applications to manage the software-licensing lifecycle in Labs64 NetLicensing. Prior to 0.1.8, netlicensing_get_product passes the caller-controlled product_number to src/netlicensing_mcp/tools/products.py, which interpolates it into a REST path consumed by nl_get() in src/netlicensing_mcp/client.py without path-segment validation. A traversal segment can be normalized from the intended product path to the /token endpoint, after which the response is serialized through _wrap_json instead of _wrap_json_token_read, bypassing redact_token_read() protections for APIKEY number and SHOP shopURL fields. An authenticated MCP client with a non-administrative API key can retrieve plaintext token values, and a recovered administrative token can provide broad read, write, and delete access to the NetLicensing account. This issue is fixed in version 0.1.8.

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS