Microsoft UFO up to 3.0.0 JSON File ShellReceiver.run_shell os command injection

Summaryinfo

A vulnerability marked as critical has been reported in Microsoft UFO up to 3.0.0. This vulnerability affects the function ShellReceiver.run_shell of the component JSON File Handler. The manipulation leads to os command injection. This vulnerability is referenced as CVE-2026-45322. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Microsoft UFO up to 3.0.0. This issue affects the function ShellReceiver.run_shell of the component JSON File Handler. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Microsoft UFO open-source framework for intelligent automation across devices and platforms. Microsoft UFO tagged releases up to and including v3.0.0 contain an OS command injection vulnerability in the shell action replay path. In affected releases, ShellReceiver.run_shell() passes a command string from action parameters directly to subprocess.Popen() with shell=True and executable=powershell.exe. The same shell-execution behavior is also reachable through ShellReceiver.execute_command(). The shell receiver is invoked by action classes such as RunShellCommand.execute() and ExecuteCommand.execute(), which forward stored action parameters to the shell receiver. Because UFO stores planned and executed actions in per-session JSON records, an attacker who can write or modify a session/action JSON file can plant a shell action. When the session is resumed or replayed, UFO executes the attacker's command as the UFO process user.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-45322 since 05/11/2026. The exploitation is known to be easy. An attack has to be approached locally. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/28/2026). MITRE ATT&CK project uses the attack technique T1202 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• Microsoft

Name

• UFO

Version

• 3.0

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://github.com/microsoft/UFO/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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