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 /ap

highCVSS 7.5CVE-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.

Details

Source: NVD Recent CVEs (US · database · site)
Severity: high — CVSS 7.5
Published: 2026-07-15
Last updated: 2026-07-16
Exploitation: Not in CISA KEV at last sync

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-49353

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Low exploitation riskCVE-2026-493530.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-49353	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

highGHSA-6g2f-w7g3-77vf: 9router has an Incomplete Fix: Local-Only Access Gate Bypass in 9router via Host Header S…ghsa

Recent advisories for 9Router is an

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

criticalCVE-2026-63732: 9router 0.4.59 (fixed in 0.4.60) contains a chain of vulnerabilities: a hardcoded default pass…nvd · 2026-07-23
highCVE-2026-63313: 9Router before 0.4.72 contains a server-side request forgery (SSRF) vulnerability in the /v1/w…nvd · 2026-07-23
highCVE-2026-62312: 9Router is an AI router & token saver. Prior to 0.5.2, 9Router allows a remote authenticated a…nvd · 2026-07-15
unknownCVE-2026-56679: 9Router is an AI router & token saver. Prior to 0.5.4, the PATCH /api/settings endpoint writes…nvd · 2026-07-15
mediumCVE-2026-56678: 9Router is an AI router & token saver. Prior to 0.5.6, the Kiro API-key validation endpoint PO…nvd · 2026-07-15
criticalCVE-2026-49352: 9Router is an AI router & token saver. From 0.2.21 until 0.4.44, 9Router used the hardcoded fa…nvd · 2026-07-15