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Azure MCP Server has Server-Side Request Forgery issue that allows authorized attacker to elevate privileges over a network

High severity GitHub Reviewed Published Mar 10, 2026 to the GitHub Advisory Database • Updated Mar 12, 2026

Package

npm @azure/mcp (npm)

Affected versions

>= 2.0.0-beta.1, < 2.0.0-beta.17
>= 1.0.0, < 1.0.2

Patched versions

2.0.0-beta.17
1.0.2
nuget Azure.Mcp (NuGet)
>= 2.0.0-beta.1, < 2.0.0-beta.17
>= 1.0.0, < 1.0.2
2.0.0-beta.17
1.0.2
pip msmcp-azure (pip)
>= 2.0.0b14, < 2.0.0b17
2.0.0b17

Description

Server-Side Request Forgery (SSRF) in Azure MCP Server allows an authorized attacker to elevate privileges over a network.

References

Published by the National Vulnerability Database Mar 10, 2026
Published to the GitHub Advisory Database Mar 10, 2026
Reviewed Mar 11, 2026
Last updated Mar 12, 2026

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS score

Exploit Prediction Scoring System (EPSS)

This score estimates the probability of this vulnerability being exploited within the next 30 days. Data provided by FIRST.
(24th percentile)

Weaknesses

Server-Side Request Forgery (SSRF)

The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. Learn more on MITRE.

CVE ID

CVE-2026-26118

GHSA ID

GHSA-hhfx-wfvq-7g9c

Source code

Credits

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