CVE-2026-49353
High
Description
9Router is an AI router & token saver. In 0.4.45 and earlier, 9Router's src/dashboardGuard.js local-only access gate used Host and Origin headers in isLocalRequest() to protect /api/mcp/*, /api/tunnel/*, and /api/cli-tools/*, allowing header spoofing in reverse proxy or tunnel deployments to reach MCP child process stdin paths.
SeverityHigh
CVSS7.5
Exploit probability—
Product9router
PublishedJul 15, 2026
First seenJul 15, 2026
Weakness typeCWE-290CWE-290
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| 9routernpm | v ≤ 0.4.55 | — |
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