CVE-2026-46339Public exploitNetwork attack vector

Unauthenticated command execution via unprotected MCP routes

Published Jul 15, 2026 · Updated Jul 15, 2026

Command injection in Decolua 9Router 0.4.30 through 0.4.36 allows remote attackers to execute OS commands through MCP plugin APIs. The proxy middleware omits /api/cli-tools/* and /api/mcp/* from its authenticated matcher, so cowork-settings stores attacker-controlled command and argument values and the MCP SSE bridge passes them to spawn(). Network access to the service is sufficient; the resulting process runs with the 9Router service account and can read or write host data, start processes, or interrupt service.

CVSS severity10.0
Critical
EPSS probability3.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Decolua 9Router 0.4.30 through 0.4.36 allows remote attackers to execute OS commands through MCP plugin APIs. The proxy middleware omits /api/cli-tools/* and /api/mcp/* from its authenticated matcher, so cowork-settings stores attacker-controlled command and argument values and the MCP SSE bridge passes them to spawn(). Network access to the service is sufficient; the resulting process runs with the 9Router service account and can read or write host data, start processes, or interrupt service.

The record

CVE
CVE-2026-46339
Published
Jul 15, 2026
Updated
Jul 15, 2026
Vendor
Decolua
Product
9Router
Classifications
CWE-78, CWE-306, T1059, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.4.30, < 0.4.37

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Decolua · 9Routerversion=>= 0.4.30, < 0.4.37

Published CVSS scores

10.0GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CWE-306Missing Authentication for Critical Function
T1059Command and Scripting Interpreter
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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