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CVE-2026-30625: Upsonic: remote code execution vulnerability in its MCP server/task creation functionality

criticalCVSS 3.1 9.8GHSA-cw73-5f7h-m4gv

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.

Published Apr 15, 2026 · Updated Apr 16, 2026

Affected packages

upsonic

Ecosystem
PyPI
Affected
< 0.72.0
Fixed in
0.72.0
Check
pip show upsonic

Advisory details

From the GitHub Advisory Database (CC BY 4.0).

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.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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