CVE-2026-105791
highMicrosoft UFO is an open-source framework for intelligent automation across devices and platforms.
Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the run_shell tool in the CommandLineExecutor component of ufo/client/mcp/local_servers/cli_mcp_server.py validates only the first token of the bash_command parameter and permits explorer.exe. On Windows, explorer.exe delegates its following path argument to ShellExecute, so an attacker-influenced agent call can launch an arbitrary executable or script as the desktop user even though the subprocess uses shell=False. Exploitation depends on a user running an affected agent workflow and on inducing the tool call, but successful execution can access or modify that user's files, tokens, and sessions. This issue is fixed in version 3.0.9.
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/microsoft/UFO/commit/3e1262fc091eb319253b7a1338b63f62cc6c82b1 security-advisories@github.com
- https://github.com/microsoft/UFO/releases/tag/v3.0.9 security-advisories@github.com
- https://github.com/microsoft/UFO/security/advisories/GHSA-cmq9-vqjf-4q2q security-advisories@github.com
- https://github.com/microsoft/UFO/security/advisories/GHSA-cmq9-vqjf-4q2q 134c704f-9b21-4f2e-91b3-4a467353bcc0