---
id: CVE-2026-26118
aliases:
  - GHSA-hhfx-wfvq-7g9c
  - PYSEC-2026-2669
title: >-
  Azure MCP Server has Server-Side Request Forgery issue that allows authorized
  attacker to elevate privileges over a network
summary: >-
  Azure MCP Server has Server-Side Request Forgery issue that allows authorized
  attacker to elevate privileges over a network
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
vendor: Azure
product: Azure.Mcp
ecosystem: nuget
affected:
  - 'Azure.Mcp >= 2.0.0-beta.1, < 2.0.0-beta.17'
  - 'Azure.Mcp >= 1.0.0, < 1.0.2'
  - '@azure/mcp >= 2.0.0-beta.1, < 2.0.0-beta.17'
  - 'msmcp-azure >= 2.0.0b14, < 2.0.0b17'
  - '@azure/mcp >= 1.0.0, < 1.0.2'
patched:
  - Azure.Mcp 2.0.0-beta.17
  - Azure.Mcp 1.0.2
  - '@azure/mcp 2.0.0-beta.17'
  - msmcp-azure 2.0.0b17
  - '@azure/mcp 1.0.2'
published: '2026-03-10'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T03:50:39.818542295Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hhfx-wfvq-7g9c'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-26118'
  - url: >-
      https://github.com/microsoft/mcp/commit/804ff60293206c4d8e832f772097238561bf2c34
  - url: 'https://github.com/microsoft/mcp'
  - url: 'https://github.com/microsoft/mcp/releases/tag/Azure.Mcp.Server-1.0.2'
  - url: >-
      https://github.com/microsoft/mcp/releases/tag/Azure.Mcp.Server-2.0.0-beta.17
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26118'
tags:
  - osv
  - nuget
  - exploit-available
epss: 0.00861
epssPercentile: 0.56782
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/j-dahl7/mcp-attack-detection-sentinel'
  checkedAt: '2026-09-26T09:05:40.774Z'
exploitAvailable: true
ingestedAt: '2026-07-13T18:57:59.214Z'
---

## Overview

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

## Affected packages

- `Azure.Mcp >= 2.0.0-beta.1, < 2.0.0-beta.17`
- `Azure.Mcp >= 1.0.0, < 1.0.2`
- `@azure/mcp >= 2.0.0-beta.1, < 2.0.0-beta.17`
- `msmcp-azure >= 2.0.0b14, < 2.0.0b17`
- `@azure/mcp >= 1.0.0, < 1.0.2`

## Remediation

Upgrade to a patched release:

- `Azure.Mcp 2.0.0-beta.17`
- `Azure.Mcp 1.0.2`
- `@azure/mcp 2.0.0-beta.17`
- `msmcp-azure 2.0.0b17`
- `@azure/mcp 1.0.2`