CVE-2026-57496
Published:July 21, 2026
Updated:August 27, 2026
The "netlicensing_get_product" MCP tool in "netlicensing-mcp" interpolates a caller-controlled "product_number" argument directly into a REST URL path without any validation. Passing "../token" as the product number causes "httpx" to normalize "/product/../token" into "/token", silently redirecting the request to the NetLicensing token endpoint instead of the intended product endpoint. The response is then serialized through the generic "_wrap_json" wrapper rather than the token-specific "_wrap_json_token_read" wrapper, bypassing all APIKEY "number" and SHOP "shopURL" redaction. An authenticated MCP client can recover plaintext API key values that the token read tools intentionally mask, including admin-level APIKEY credentials.
Affected Packages
https://github.com/Labs64/NetLicensing-MCP.git (GITHUB):
Affected version(s) >=0.0.6 <0.1.8Fix Suggestion:
Update to version 0.1.8netlicensing-mcp (PYTHON):
Affected version(s) >=0.0.1 <0.1.8Fix Suggestion:
Update to version 0.1.8Related Resources (5)
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Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')