CVE-2026-62312
8.8
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
9Router is an AI router & token saver. Prior to 0.5.2, 9Router allows a remote authenticated attacker to achieve arbitrary code execution on the host operating system by combining a Host header bypass of localhost-only routes with unvalidated MCP plugin args passed to child_process.spawn(), allowing malicious custom plugins to execute commands through /api/mcp//sse. This issue is fixed in version 0.5.2.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| decolua | 9router | < 0.5.2 | affected |
Weaknesses
- CWE-78: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
References
- https://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrp
- https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dc
- https://github.com/decolua/9router/releases/tag/v0.5.2
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