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 ↗

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

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

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