Upsonic 0.71.6 MCP os command injection

Summaryinfo

A vulnerability has been found in Upsonic 0.71.6 and classified as critical. Affected by this vulnerability is an unknown functionality of the component MCP Handler. The manipulation leads to os command injection. This vulnerability is documented as CVE-2026-30625. The attack can be initiated remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Upsonic 0.71.6. It has been rated as critical. This issue affects an unknown part of the component MCP 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:

Upsonic 0.71.6 contains a remote code execution vulnerability in its MCP server/task creation functionality. The application allows users to define MCP tasks with arbitrary command and args values. Although an allowlist exists, certain allowed commands (npm, npx) accept argument flags that enable execution of arbitrary OS commands. Maliciously crafted MCP tasks may lead to remote code execution with the privileges of the Upsonic process. In version 0.72.0 Upsonic added a warning about using Stdio servers being able to execute commands directly on the machine.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-30625 since 03/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

Upgrading to version 0.72.0 eliminates this vulnerability.

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Productinfo

Name

• Upsonic

Version

• 0.71.6

Website

• Product: https://github.com/Upsonic/Upsonic/

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