CVE-2026-105789
Microsoft UFO: Arbitrary file write in the Linux MCP `execute_command` tool
Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the execute_command tool in ufo/client/mcp/http_servers/linux_mcp_server.py treats sort and uniq as read-only commands while the free-form command parameter can select their file-output forms. An authenticated caller can use sort -o or the optional second uniq operand to create or overwrite files writable by the UFO server process without shell metacharacters, because the allowed binary opens the destination itself and the argument policy does not reject the operation. This can corrupt configuration or other writable data and disrupt the service, but the demonstrated primitive does not directly disclose files or establish arbitrary code execution. This issue is fixed in version 3.0.9.
| CWE | CWE-88 CWE-184 |
| Vendor | microsoft |
| Product | ufo |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Oct 6, 2026 |
| Last Updated | Oct 6, 2026 |
Get instant alerts for microsoft ufo
Be the first to know when new medium vulnerabilities affecting microsoft ufo are published — delivered to Slack, Telegram or Discord.
CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:L