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CVE-2026-109492ImportantEoP

Microsoft MCP Gateway Elevation of Privilege Vulnerability

MSRC advisory NVD CVE.org

Assessment

Authorization bypass through user-controlled key in Microsoft MCP Gateway allows an authorized attacker to elevate privileges over a network.

Severity
Important
CVSS base score
Not published
Impact
Elevation of Privilege
Exploitation detected
No known exploitation (MSRC assessment)
Exploitability
Not assessed
Publicly disclosed
No (MSRC assessment)
EPSS · 30-day forecast
No EPSS score collected
Customer action
Required: follow the MSRC remediation guidance
More details
Public detection template
No Nuclei template is listed in the current collected catalog
Component
Microsoft MCP Gateway
Weakness
CWE-639: Authorization Bypass Through User-Controlled Key
Issued by
Microsoft
Published
10 Nov 2026 · November 2026
Last revised
10 Nov 2026

Updates that fix it

0 KBs

No KB listed

No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.

Affected products

Open Source Software
1 affected product
  • mcp-gateway
Page history

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Cite this version
Field-level log (0)

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No retained field changes for this selection.

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

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