decolua 9router up to 0.5.1 child_process /api/mcp child_process.spawn os command injection

Summaryinfo

A vulnerability categorized as very critical has been discovered in decolua 9router up to 0.5.1. Affected is the function child_process.spawn of the file /api/mcp of the component child_process. The manipulation results in os command injection. This vulnerability is reported as CVE-2026-62312. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability classified as very critical has been found in decolua 9router up to 0.5.1. Affected is the function child_process.spawn of the file /api/mcp of the component child_process. The manipulation with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

9Router is an AI router & token saver. Prior to 0.5.2, 9Router allows a remote authenticated attacker to achieve arbitrary code execution on the host operating system by combining a Host header bypass of localhost-only routes with unvalidated MCP plugin args passed to child_process.spawn(), allowing malicious custom plugins to execute commands through /api/mcp//sse. This issue is fixed in version 0.5.2.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-62312 since 07/13/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Additional levels of successful authentication are required for exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/15/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 0.5.2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• decolua

Name

• 9router

Version

• 0.5.0
• 0.5.1

Website

• Product: https://github.com/decolua/9router/

CPE 2.3info

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CPE 2.2info

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