CVE-2026-62312
9Router is an AI router & token saver. Prior to 0.5.2, 9Router allows a remote authenticated attacker to achieve arbitrary code execution on
CVSS
8.8
High
EPSS
0.7%
p50
KEV
—
Exploit Today
15
0-100
Published: Jul 15, 2026 · Last modified: Jul 16, 2026 · CWE-78
0.7%EPSS · 30 days0.7%
2026-07-162026-07-17
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.
- github.comhttps://github.com/decolua/9router/commit/da667836cc7584bea0edd893de1d590c9ea279dc
- github.comhttps://github.com/decolua/9router/releases/tag/v0.5.2
- github.comhttps://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrp
- github.comhttps://github.com/decolua/9router/security/advisories/GHSA-63p9-g54h-prrp
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