CVE-2026-46339: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in decolua 9router
9Router versions from 0.4.30 up to but not including 0.4.37 contain an OS command injection vulnerability in the src/proxy.js middleware. This flaw allows unauthenticated attackers to register custom plugins and execute commands via the MCP bridge due to insufficient protection of certain API endpoints. The vulnerability is fixed in version 0.4.37.
AI Analysis
Technical Summary
The vulnerability in 9Router affects versions >=0.4.30 and <0.4.37, where the src/proxy.js middleware fails to protect the /api/cli-tools/* and /api/mcp/* endpoints. This allows unauthenticated users to register custom plugins through the cowork-settings route and execute arbitrary OS commands via the MCP bridge. The issue is classified as CWE-78 (OS Command Injection) and CWE-306 (Missing Authentication for Critical Function). The vulnerability is resolved in version 0.4.37.
Potential Impact
Successful exploitation allows unauthenticated attackers to execute arbitrary OS commands on the affected system, leading to full compromise of confidentiality, integrity, and availability. The CVSS score is 10.0 (critical), indicating a high-severity impact with network attack vector, no privileges required, no user interaction, and complete system compromise.
Mitigation Recommendations
Upgrade 9Router to version 0.4.37 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Until patched, restrict access to the affected API endpoints to trusted users or networks if possible.
CVE-2026-46339: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in decolua 9router
Description
9Router versions from 0.4.30 up to but not including 0.4.37 contain an OS command injection vulnerability in the src/proxy.js middleware. This flaw allows unauthenticated attackers to register custom plugins and execute commands via the MCP bridge due to insufficient protection of certain API endpoints. The vulnerability is fixed in version 0.4.37.
CVSS v3.1
Score 10.0critical
Affected software
pkg:github/decolua/9routerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in 9Router affects versions >=0.4.30 and <0.4.37, where the src/proxy.js middleware fails to protect the /api/cli-tools/* and /api/mcp/* endpoints. This allows unauthenticated users to register custom plugins through the cowork-settings route and execute arbitrary OS commands via the MCP bridge. The issue is classified as CWE-78 (OS Command Injection) and CWE-306 (Missing Authentication for Critical Function). The vulnerability is resolved in version 0.4.37.
Potential Impact
Successful exploitation allows unauthenticated attackers to execute arbitrary OS commands on the affected system, leading to full compromise of confidentiality, integrity, and availability. The CVSS score is 10.0 (critical), indicating a high-severity impact with network attack vector, no privileges required, no user interaction, and complete system compromise.
Mitigation Recommendations
Upgrade 9Router to version 0.4.37 or later, where this vulnerability is fixed. No other official remediation or temporary fixes are documented. Until patched, restrict access to the affected API endpoints to trusted users or networks if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-13T18:37:30.990Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a57f59668715ace437838c4
Added to database: 07/15/2026, 21:03:18 UTC
Last enriched: 07/15/2026, 21:17:53 UTC
Last updated: 07/16/2026, 04:27:43 UTC
Views: 22
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