---
title: "CVE-2026-114123: D365 F&O MCP Server - Authentication Bypass"
description: "D365 F&O MCP Server < 1.11.0 contains an authentication bypass caused by empty or unset API_KEY in default Azure deployment, letting unauthenticated attackers access proprietary X++ source and metadata via JSON-RPC, exploit requires no authentication or network restrictions."
url: https://panop.io/threat-heartbeat/CVE-2026-114123/
---

# CVE-2026-114123 D365 F&O MCP Server - Authentication Bypass

D365 F&O MCP Server < 1.11.0 contains an authentication bypass caused by empty or unset API\_KEY in default Azure deployment, letting unauthenticated attackers access proprietary X++ source and metadata via JSON-RPC, exploit requires no authentication or network restrictions.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114123)

## Details

Type

Authentication Bypass

Impact

Information Disclosure

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Published

21 October 2026

Updated

22 October 2026

Weakness

[CWE-306](https://cwe.mitre.org/data/definitions/306.html)

## Vendor fix

Update to version 1.11.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-114123](https://nvd.nist.gov/vuln/detail/CVE-2026-114123)
- [https://github.com/dynamics365ninja/d365fo-mcp-server/releases/tag/v1.11.0](https://github.com/dynamics365ninja/d365fo-mcp-server/releases/tag/v1.11.0)
- [https://github.com/dynamics365ninja/d365fo-mcp-server/security/advisories/GHSA-8764-fh3m-wf7g](https://github.com/dynamics365ninja/d365fo-mcp-server/security/advisories/GHSA-8764-fh3m-wf7g)
- [https://github.com/dynamics365ninja/d365fo-mcp-server/commit/384394a81e1c6c1e0149586203395240a38fc818](https://github.com/dynamics365ninja/d365fo-mcp-server/commit/384394a81e1c6c1e0149586203395240a38fc818)
- [https://github.com/dynamics365ninja/d365fo-mcp-server/commit/e70bd051f817ebb652d664b10a944fe2c5495de2](https://github.com/dynamics365ninja/d365fo-mcp-server/commit/e70bd051f817ebb652d664b10a944fe2c5495de2)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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