{"id":"CVE-2026-48989","state":"PUBLISHED","title":"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.","publishedAt":"2026-06-17T21:02:15.047Z","updatedAt":"2026-06-18T15:44:08.967Z","severity":{"score":8.9,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","source":"GitHub_M"},"assigner":"GitHub_M","products":["CursorTouch Windows-MCP"],"affected":[{"vendor":"CursorTouch","product":"Windows-MCP","versions":[{"version":"< 0.7.5","status":"affected"}]}],"references":["https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g","https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5"],"weaknesses":["CWE-306"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/48xxx/CVE-2026-48989.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-48989","state":"PUBLISHED","datePublished":"2026-06-17T21:02:15.047Z","dateUpdated":"2026-06-18T15:44:08.967Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-26T23:26:07.975Z"},"containers":{"cna":{"title":"Windows-MCP: HTTP transports expose unauthenticated PowerShell control with wildcard CORS","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"CursorTouch","product":"Windows-MCP","versions":[{"version":"< 0.7.5","status":"affected"}]}],"references":[{"url":"https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g","name":"https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5","name":"https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.9,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"CWE-306: Missing Authentication for Critical Function","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-06-17T21:02:15.047Z"},"source":{"advisory":"GHSA-vrxg-gm77-7q5g","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-18T15:43:54.214198Z","id":"CVE-2026-48989","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-18T15:44:08.967Z"}}]}}}