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CVE-2026-63732

CRITICAL
9.9
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-63732
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-07-18 12:19 UTC
Published
2026-07-23 21:16 UTC
Last updated
2026-07-23 21:16 UTC
Primary CWE
CWE-78
Improper Neutralization of Special Elements used in an OS Co…
Vendor / Product
decolua / 9router
Sources
cve.org  ·  NVD

Severity & Metrics

9.9 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Affected products (1)
VendorProductPlatformVersions
decolua 9router — 0 < 0.4.60, 0.4.60
Weakness (CWE)
CWESourceDescription
CWE-78 cna Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
CVSS scores (2)
ScoreSeverityVersionSourceVector
9.9 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.4 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
References (2)
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