---
id: CVE-2026-57496
title: >-
  NetLicensing MCP Server is a natural-language interface that enables agentic
  applications to manage the software-licensing lifecycle in Labs64 NetLicensing
summary: >-
  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_nu…
severity: critical
cvss: 9.6
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-22
vendor: netlicensing-mcp
product: netlicensing-mcp
affected:
  - netlicensing-mcp < 0.1.8
patched:
  - netlicensing-mcp 0.1.8
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T19:17:41.733'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57496'
references:
  - url: >-
      https://github.com/Labs64/NetLicensing-MCP/commit/b8fd0ea76d533202573eb24add9fb2fbd9331496
    label: security-advisories@github.com
  - url: 'https://github.com/Labs64/NetLicensing-MCP/pull/6'
    label: security-advisories@github.com
  - url: 'https://github.com/Labs64/NetLicensing-MCP/releases/tag/0.1.8'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Labs64/NetLicensing-MCP/security/advisories/GHSA-hxpf-9xvq-wph8
    label: security-advisories@github.com
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-57496'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/netlicensing-mcp/PYSEC-2026-3489.yaml
  - url: 'https://github.com/advisories/GHSA-hxpf-9xvq-wph8'
  - url: 'https://github.com/Labs64/NetLicensing-MCP'
tags:
  - nvd
  - ghsa
  - pip
  - cve.org
  - osv
  - exploit-available
aliases:
  - GHSA-hxpf-9xvq-wph8
  - PYSEC-2026-3489
ecosystem: pip
ingestedAt: '2026-07-21T19:04:57.195Z'
epss: 0.00435
epssPercentile: 0.3763
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-21T01:05:25.602524Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-57496)

Affected packages:

- `netlicensing-mcp < 0.1.8`

Patched in:

- `netlicensing-mcp 0.1.8`

Source: https://github.com/advisories/GHSA-hxpf-9xvq-wph8