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CVE PROGRAM SOURCE RECORD9.4 Critical

CVE-2026-63732

9router before 0.4.60 Remote Code Execution via default password

Description

9router 0.4.59 (fixed in 0.4.60) contains a chain of vulnerabilities: a hardcoded default password (123456) that authenticates any fresh installation, a bypass of the LOCAL_ONLY network gate via a spoofed Host header, and unvalidated arguments passed to child_process.spawn() when registering MCP plugins. A remote, unauthenticated attacker can log in with the default credential, spoof the Host header to reach local-only routes, and register a malicious MCP plugin (e.g. node -e <payload>) to achieve arbitrary code execution on the host operating system when the plugin's SSE endpoint is triggered.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

decolua 9router

Default version status: unaffected

  • 0 to < 0.4.60affected
  • 0.4.60unaffected
pkg:npm/9router

References