CVE-2026-48989
Windows-MCP: HTTP transports expose unauthenticated PowerShell control with wildcard CORS
Description
Windows-MCP is an open-source project that integrates AI agents with Windows. In versions prior to 0.7.5, certain HTTP modes exposed the MCP control plane without authentication while enabling wildcard CORS (allow_origins=*, allow_methods=*, allow_headers=*). Because the same server also exposed a PowerShell tool that executes caller-controlled commands as the Windows user running Windows-MCP, attackers could reach the control plane from arbitrary origins or non-browser clients and achieve arbitrary PowerShell execution. This issue was fixed in version 0.7.5.
INFO
Published Date :
June 17, 2026, 10:16 p.m.
Last Modified :
Oct. 26, 2026, 12:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Windows-MCP to version 0.7.5.
- Apply vendor patches if available.
- Review and restrict CORS settings.
- Implement proper authentication for control plane.
Public PoC/Exploit Available at Github
CVE-2026-48989 has a 2 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-48989.
| URL | Resource |
|---|---|
| https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5 | |
| https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-48989 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-48989
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
The Project shares all information on MCP related CVE's published
mcp mcp-security mcp-cve
Static scanner for MCP-connected AI agent pipelines — 225 rules across 11 categories, 12 compliance frameworks, OWASP Agentic 10/10 + MCP 10/10, GitHub Action, SARIF, public CVE-to-rule ledger.
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Python Dockerfile Shell TypeScript HTML Makefile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-48989 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-48989 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 26, 2026
Action Type Old Value New Value Added Translation Title: Windows-MCP de CursorTouch, Description: Windows-MCP es un proyecto de código abierto que integra agentes de IA con Windows. En versiones anteriores a la 0.7.5, ciertos modos HTTP expusieron el plano de control de MCP sin autenticación mientras habilitaban CORS de comodín (allow_origins=*, allow_methods=*, allow_headers=*). Debido a que el mismo servidor también expuso una herramienta de PowerShell que ejecuta comandos controlados por el llamador como el usuario de Windows que ejecuta Windows-MCP, los atacantes podían alcanzar el plano de control desde orígenes arbitrarios o clientes que no eran navegadores y lograr la ejecución arbitraria de PowerShell. Este problema se solucionó en la versión 0.7.5. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 18, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-48989', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'yes'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-06-18T15:43:54.214198Z'} -
New CVE Received by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'CursorTouch', 'product': 'Windows-MCP', 'versions': [{'status': 'affected', 'version': '< 0.7.5'}]}] Added Description Windows-MCP is an open-source project that integrates AI agents with Windows. In versions prior to 0.7.5, certain HTTP modes exposed the MCP control plane without authentication while enabling wildcard CORS (allow_origins=*, allow_methods=*, allow_headers=*). Because the same server also exposed a PowerShell tool that executes caller-controlled commands as the Windows user running Windows-MCP, attackers could reach the control plane from arbitrary origins or non-browser clients and achieve arbitrary PowerShell execution. This issue was fixed in version 0.7.5. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-306 Added Reference https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5 Added Reference https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g