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VulnerabilityPublished

CVE-2026-54446: Labs64 NetLicensing-MCP · Missing Authentication

Affects Labs64 NetLicensing-MCPSource CVE Database V5

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Not known to be exploited · CVSS 8.1 High : upgrade to 0.1.6 soon.

Data as of 1 Nov 2026, 11:03 UTC

CVSS 3.1 base score
8.1High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 49% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 0.1.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Upgrade NetLicensing-MCP and labs64/NetLicensing-MCP to 0.1.6.

Affected software

ProductAffectedFixed in
Labs64NetLicensing-MCPAffected
  • <0.1.6
Fixed in
  • 0.1.6
GitHublabs64/NetLicensing-MCPpkg:github/labs64/NetLicensing-MCPOther threatsAffected
  • <0.1.6
Fixed in
  • 0.1.6

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Labs64 NetLicensing-MCP to version 0.1.6 or later, where this authentication bypass vulnerability is fixed. Until upgrading, restrict network access to the /mcp endpoint to trusted users only, and avoid using HTTP transport without proper authentication. Patch status is confirmed fixed in 0.1.6.

Description

NetLicensing MCP Server is a natural-language interface that enables agentic applications to manage the software-licensing lifecycle in Labs64 NetLicensing. Prior to 0.1.6, network-reachable HTTP transport requests to /mcp that omit x-netlicensing-api-key, Authorization: Bearer, and the apikey query parameter pass through ApiKeyMiddleware in src/netlicensing_mcp/server.py without authentication. The downstream api_key_ctx in src/netlicensing_mcp/client.py then falls back to the operator's NETLICENSING_API_KEY and authenticates upstream NetLicensing REST API calls under the operator account. An unauthenticated attacker can invoke MCP tools to enumerate products, licenses, licensees, and transactions, create or modify licensing objects, perform validations, and execute destructive delete operations. The issue affects HTTP deployments configured with a server-side key and does not require user interaction. This issue is fixed in version 0.1.6.

References

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