CVE-2026-57496 Details
Description
NetLicensing MCP Server is a natural-language interface that enables agentic applications to manage the software-licensing lifecycle in Labs64 NetLicensing. Prior to 0.1.8, 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.
A path traversal vulnerability has been identified in Labs64 NetLicensing MCP Server versions prior to 0.1.8. The issue arises in the 'netlicensing_get_product' function, which improperly validates the 'product_number' input. This lack of validation allows an authenticated user to manipulate the REST path, redirecting requests to the '/token' endpoint. As a result, the response includes sensitive API key information that is normally redacted. This vulnerability could be exploited by any authenticated MCP client with a valid API key, especially if it grants administrative privileges.
Users can update to Labs64 NetLicensing MCP Server version 0.1.8 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 15, 2026CISA-ADP
Assessed Oct 21, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Labs64/NetLicensing-MCP/security/advisories/GHSA-hxpf-9xvq-wph8 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/Labs64/NetLicensing-MCP/commit/b8fd0ea76d533202573eb24add9fb2fbd9331496 | [email protected] | Source CodeVendor |
| https://github.com/Labs64/NetLicensing-MCP/pull/6 | [email protected] | Source CodeVendor |
| https://github.com/Labs64/NetLicensing-MCP/releases/tag/0.1.8 | [email protected] | Release NotesVendor |
| https://github.com/Labs64/NetLicensing-MCP/security/advisories/GHSA-hxpf-9xvq-wph8 | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Labs64 NetLicensing MCP Server | <= 0.1.5 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 21, 2026 | CVE Modified | CISA-ADP |
| Oct 15, 2026 | New CVE Received | [email protected] |