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

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

Published: 2026-03-10 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-26118 is rated Moderate Risk (56/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.96%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-26118

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.05% 0.96% +0.91%
2 2026-05-26 0.05% 0.05% -0.00%
3 2026-05-17 — 0.05% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-26118

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.8 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.8 5.9 [email protected]

Weakness enumeration for CVE-2026-26118

GitHub Security Advisory for CVE-2026-26118

GHSA-hhfx-wfvq-7g9c · Severity: high · Ecosystem: nuget — Azure MCP Server has Server-Side Request Forgery issue that allows authorized attacker to elevate privileges over a network

Affected software / configurations for CVE-2026-26118

Vendor Product Version Raw CPE
microsoft azure_mcp_server < 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:*:*:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta1:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta10:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta11:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta12:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta13:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta14:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta15:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta16:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta2:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta3:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta4:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta5:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta6:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta7:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta8:*:*:*:*:*:*
microsoft azure_mcp_server 2.0.0 cpe:2.3:a:microsoft:azure_mcp_server:2.0.0:beta9:*:*:*:*:*:*

References for CVE-2026-26118

cvelogic Threat Intelligence