CVE-2026-26118 json
Azure MCP Server Tools Elevation of Privilege Vulnerability
published 2026-03-10 8 mo ago modified 2026-09-10 1 mo ago also GHSA-hhfx-wfvq-7g9c , PYSEC-2026-2669 , EUVD-2026-10689
- cvss
- 8.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
Server-side request forgery (ssrf) in Azure MCP Server allows an authorized attacker to elevate privileges over a network.
Patch / fix
- nuget Azure.Mcp 1.0.2, 2.0.0-beta.17
- npm @azure/mcp 1.0.2, 2.0.0-beta.17
- pypi msmcp-azure 2.0.0b17
- 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
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 8 mo ago
Exploit prediction
1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
| CNA | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| OSV | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| nuget | Azure.Mcp | >=2.0.0-beta.1, <2.0.0-beta.17 >=1.0.0, <1.0.2 |
2.0.0-beta.17 1.0.2 |
| npm | @azure/mcp | >=2.0.0-beta.1, <2.0.0-beta.17 >=1.0.0, <1.0.2 |
2.0.0-beta.17 1.0.2 |
| pypi | msmcp-azure | >=2.0.0b14, <2.0.0b17 |
2.0.0b17 |
Affected products
- Microsoft Azure MCP Server Tools 1.0.0 (npm)
- Microsoft Azure MCP Server Tools 1.0.0 (NuGet)
- Microsoft Azure MCP Server Tools 2.0.0 (npm)
- Microsoft Azure MCP Server Tools 2.0.0 (NuGet)
- Microsoft Azure MCP Server Tools 2.0.0 (PyPi)
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
msrc.microsoft.com
/update-guide/vulnerability/CVE-2026-26118
vendor-advisory, patch, web
-
github.com
/microsoft/mcp/commit/804ff60293206c4d8e832f772097238561bf2c34
web
-
nvd.nist.gov
/vuln/detail/CVE-2026-26118
advisory
-
github.com
/microsoft/mcp
package
-
github.com
/microsoft/mcp/releases/tag/Azure.Mcp.Server-1.0.2
web
-
github.com
/microsoft/mcp/releases/tag/Azure.Mcp.Server-2.0.0-beta.17
web
-
pypi.org
/project/msmcp-azure
package
-
github.com
/advisories/GHSA-hhfx-wfvq-7g9c
advisory
Sources
- CVE List CVE-2026-26118
- GitHub Advisory GHSA-hhfx-wfvq-7g9c
- NVD CVE-2026-26118
- OSV PYSEC-2026-2669
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.