PT-2026-64186 · Decolua · 9Router

Darealdanh · CVE-2026-63732 · Published 2026-07-23 · Updated 2026-07-23

NVD

CVSS v3.1

9.9

Critical

Base vector

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

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 ) to achieve arbitrary code execution on the host operating system when the plugin's SSE endpoint is triggered.

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-63732

Affected Products

9Router

References · 3

• https://github.com/decolua/9router/security/advisories/GHSA-4922-8r65-fq26 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-63732 · Security Note
• https://vulncheck.com/advisories/9router-before-remote-code-execution-via-default-password · Note