CVE-2026-26118: Azure MCP Server Tools Elevation of Privilege Vulnerability

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-10 · updated 2026-06-19
Weakness: CWE-918

Description

Server-side request forgery (ssrf) in Azure MCP Server allows an authorized attacker to elevate privileges over a network.

Affected products

Microsoft Azure Mcp Server: before 2.0.0; 2.0.0-beta1, 2.0.0-beta10, 2.0.0-beta11, 2.0.0-beta12, 2.0.0-beta13, 2.0.0-beta14 (+10) — fixed in 2.0.0
Microsoft Azure MCP Server Tools 1.0.0 (npm): from 1.0.0 before 1.0.2 — fixed in 1.0.2
Microsoft Azure MCP Server Tools 1.0.0 (NuGet): from 1.0.0 before 1.0.2 — fixed in 1.0.2
Microsoft Azure MCP Server Tools 2.0.0 (npm): from 2.0.0-beta.1 before 2.0.0-beta.17 — fixed in 2.0.0-beta.17
Microsoft Azure MCP Server Tools 2.0.0 (NuGet): from 2.0.0-beta.1 before 2.0.0-beta.17 — fixed in 2.0.0-beta.17
Microsoft Azure MCP Server Tools 2.0.0 (PyPi): from 2.0.0-beta.1 before 2.0.0-beta.17 — fixed in 2.0.0-beta.17

How to fix

Upgrade to a fixed version: Microsoft Azure Mcp Server 2.0.0; Microsoft Azure MCP Server Tools 1.0.0 (npm) 1.0.2; Microsoft Azure MCP Server Tools 1.0.0 (NuGet) 1.0.2; Microsoft Azure MCP Server Tools 2.0.0 (npm) 2.0.0-beta.17; Microsoft Azure MCP Server Tools 2.0.0 (NuGet) 2.0.0-beta.17; Microsoft Azure MCP Server Tools 2.0.0 (PyPi) 2.0.0-beta.17. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26118

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