CVE-2026-49353

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.

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 26% of CVEs (scores of 2026-10-25)

CWE

CWE-290

Published

2026-07-15

Modified

2026-10-24

Record from

the NVD, synced 2026-10-25

Packages (OSV)

References

• https://github.com/decolua/9router/commit/5e1c1261368e06dced1cbc650684561b2c8844db
• https://github.com/decolua/9router/commit/bb86808582067e4fc6f004508a919efb9970d1d5
• https://github.com/decolua/9router/releases/tag/v0.4.46
• https://github.com/decolua/9router/security/advisories/GHSA-6g2f-w7g3-77vf
• https://github.com/decolua/9router/security/advisories/GHSA-6g2f-w7g3-77vf

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