{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-48989: Windows-MCP: HTTP transports expose unauthenticated PowerShell control with wildcard CORS","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-48989","status":"final","version":"1","initial_release_date":"2026-06-17T21:02:15.047Z","current_release_date":"2026-06-17T21:02:15.047Z","revision_history":[{"date":"2026-06-17T21:02:15.047Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"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.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-48989 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-48989"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-48989"},{"category":"external","summary":"https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g","url":"https://github.com/CursorTouch/Windows-MCP/security/advisories/GHSA-vrxg-gm77-7q5g"},{"category":"external","summary":"https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5","url":"https://github.com/CursorTouch/Windows-MCP/releases/tag/v0.7.5"}]},"product_tree":{"branches":[{"category":"vendor","name":"CursorTouch","branches":[{"category":"product_name","name":"Windows-MCP","branches":[{"category":"product_version","name":"< 0.7.5","product":{"name":"CursorTouch Windows-MCP < 0.7.5","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:cursortouch:windows-mcp:\\<_0.7.5:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-48989","title":"Windows-MCP: HTTP transports expose unauthenticated PowerShell control with wildcard CORS","notes":[{"category":"description","text":"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.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v4":{"version":"4.0","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","baseScore":8.9,"baseSeverity":"HIGH"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}