NetLicensing MCP Server: REST Path Traversal Bypasses Token Redaction
CVSS score
9.6
EPSS probability
%0.4
Risk score
0.0
Published
3 d ago
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Vulnerability description
CVE AI research
DayBreach AI Explanation
Verified against sourcesSources read
3
Source agreement
Tam uyum
Evidence confidence
%71
Short explanation
Prior to version 0.1.8, NetLicensing MCP Server contains a REST path traversal vulnerability due to missing input validation in netlicensing_get_product. This flaw allows authenticated low-privilege clients to retrieve sensitive token values in plaintext and bypass protection mechanisms.
This vulnerability enables an authenticated user to recover administrative token credentials. These recovered credentials can provide broad read, write, and delete access across the targeted NetLicensing account.
What should be done?
- Upgrade to version 0.1.8 or later
- Follow vendor advisory guidelines
- Review input validation implementations
Chain of evidence and sources
NetLicensing MCP Server 0.1.8 öncesi sürümlerde netlicensing_get_product fonksiyonu, girdi doğrulaması olmaksızın REST yoluna ekleme yapar.
Yol normalleştirme mekanizması, istekleri amaçlanan ürün yolu yerine /token uç noktasına yönlendirir.
Yetkilendirilmiş standart bir MCP istemcisi, hassas token değerlerini açık metin olarak kurtarabilir.
Show the technical text from the sources
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.
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE: CWE-22
Explanation produced with the local gemini-flash-lite-latest model. Numerical metrics and the KEV, patch and exploit statuses are not determined by AI.
IMPACT: Affected Products and Software
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 9.6 | CVSS V3_1 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N | CVE CNA |
| 9.6 | CVSS 3.x | — | Vector not published | GitHub Advisory |
| 9.6 | CVSS V31 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N | NVD |
| 0.0 | CVSS 4.0 | — | Vector not published | GitHub Advisory |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-57496 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-57496 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
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