CVE-2026-30625

9.8

CRITICAL CVSS 3.1

Upsonic MCP Server Remote Code Execution Vulnerability

Overview

Description

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.

Details

INFO

Published Date :

April 15, 2026, 4:16 p.m.

Last Modified :

April 27, 2026, 7:18 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]

Impact

Affected Products

The following products are affected by CVE-2026-30625 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID	Vendor	Product	Action
1	Upsonic	upsonic

: Total Affected Vendor : 1 | Products : 1

Scoring

CVSS Scores

The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.

Score	Version	Severity	Vector	Exploitability Score	Impact Score	Source
	CVSS 3.1	CRITICAL				134c704f-9b21-4f2e-91b3-4a467353bcc0

Solution

Update Upsonic to a version that properly sanitizes user-provided command arguments.

Update Upsonic to version 0.72.0 or later.
Avoid using Stdio servers for task execution.
Sanitize all user-supplied command arguments.

Public PoC/Exploit Available at Github

CVE-2026-30625 has a 3 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-30625.

URL	Resource
https://github.com/Upsonic/Upsonic/commit/855053fce0662227d9246268ff4a0844b481a305
https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem/

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-30625 is associated with the following CWEs:

CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-30625 weaknesses.

CAPEC-15: Command Delimiters Command Delimiters CAPEC-40: Manipulating Writeable Terminal Devices Manipulating Writeable Terminal Devices CAPEC-43: Exploiting Multiple Input Interpretation Layers Exploiting Multiple Input Interpretation Layers CAPEC-75: Manipulating Writeable Configuration Files Manipulating Writeable Configuration Files CAPEC-76: Manipulating Web Input to File System Calls Manipulating Web Input to File System Calls CAPEC-136: LDAP Injection LDAP Injection CAPEC-183: IMAP/SMTP Command Injection IMAP/SMTP Command Injection CAPEC-248: Command Injection Command Injection

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

cruxet/mcp-audit

Security scanner for Model Context Protocol (MCP) configurations. Detects command injection, insecure transports, hardcoded secrets, and known CVEs.

JavaScript TypeScript

Updated: 1 week, 5 days ago

0 stars 0 fork 0 watcher

Born at : April 22, 2026, 5:38 p.m. This repo has been linked 6 different CVEs too.

mcpgatehq/gateward

Security gateway for MCP traffic. 5 built-in rules block prompt injection, credential leakage, path traversal, cross-repo exfiltration, and destructive commands. One pip install, zero config.

mcp security python proxy claude ai-agents prompt-injection self-hosted model-context-protocol llm-security ai-security cursor security-tools path-traversal credential-leakage

Python

Updated: 2 weeks ago

0 stars 0 fork 0 watcher

Born at : April 21, 2026, 11:54 a.m. This repo has been linked 12 different CVEs too.

ScottyxNova/QMasters-TIA

None

PowerShell Shell

Updated: 1 week ago

1 stars 0 fork 0 watcher

Born at : Dec. 30, 2024, 12:41 p.m. This repo has been linked 5 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-30625 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-30625 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

Apr. 16, 2026

Action	Type	Old Value	New Value
Added	CVSS V3.1		AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CWE		CWE-77

New CVE Received by [email protected]

Apr. 15, 2026

Action	Type	New Value
Added	Description	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.
Added	Reference	https://github.com/Upsonic/Upsonic/commit/855053fce0662227d9246268ff4a0844b481a305
Added	Reference	https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem/

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.