CVE-2026-46339: 9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes
decolua · 9router
Affected: decolua 9router · Exploitation: check available, not yet exploited
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 86% of scored CVEs
DescriptionCVE.org
9Router is an AI router & token saver. From 0.4.30 until 0.4.37, 9Router's src/proxy.js middleware did not protect /api/cli-tools/* and /api/mcp/*, allowing unauthenticated registration of customPlugins through src/app/api/cli-tools/cowork-settings/route.js and command execution through the MCP bridge. This vulnerability is fixed in 0.4.37.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- decolua · 9router>= 0.4.30, < 0.4.37
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Check available, not yet exploited. A public nuclei template can confirm it on a system you are authorised to test.
- CISA KEV
- Not listed
- Public check
- 9Router <= 0.4.36 - Unauthenticated RCE · nuclei template in projectdiscovery/nuclei-templates
- Vendor
- decolua
- Published
- July 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-46339 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.