CVE-2026-57496

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Source

https://cve.org/CVERecord?id=CVE-2026-57496

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57496.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-57496

Aliases

Published

2026-10-15T18:40:16Z

Modified

2026-10-17T02:48:23Z

Severity

9.6 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N CVSS Calculator

Summary

NetLicensing MCP Server: REST Path Traversal Bypasses Token Redaction

Details

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.

Database specific

{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-22"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/57xxx/CVE-2026-57496.json"
}

References

Affected packages

Git / github.com/labs64/netlicensing-mcp

Affected ranges

Type

GIT

Repo

https://github.com/labs64/netlicensing-mcp

Events

Introduced

Fixed

b8fd0ea76d533202573eb24add9fb2fbd9331496

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "0.1.8"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

0.*

0.0.6

0.1.0

0.1.1

0.1.2

0.1.3

0.1.4

0.1.5

0.1.6

0.1.7

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-57496.json"