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
2026-10-28T02:30:30Z
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
0 Unknown introduced commit / All previous commits are affected
Fixed
b8fd0ea76d533202573eb24add9fb2fbd9331496
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.1.8"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "b8fd0ea76d533202573eb24add9fb2fbd9331496"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "0.1.8",
            "range": [
                {
                    "fixed": "b8fd0ea76d533202573eb24add9fb2fbd9331496"
                }
            ],
            "source": "REFERENCES_TAG"
        },
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "0.1.8"
                }
            ],
            "source": "DESCRIPTION"
        }
    ]
}

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"