PT-2026-60306 · Decolua · 9Router

Published 2026-07-15 · Updated 2026-07-15 · CVE-2026-62312

NVD

CVSS v3.1

8.8

High

Base vector

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

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.

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-62312

Affected Products

9Router

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-62312 · Security Note
• https://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrp · Note
• https://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dc · Note
• https://github.com/decolua/9router/releases/tag/v0.5.2 · Note