{"id":"CVE-2026-49353","aliases":["GHSA-6g2f-w7g3-77vf"],"url":"https://o3.security/vulnerability/CVE-2026-49353","summary":"9Router: Local-Only Access Gate Bypass in 9router via Host Header SpoofING","details":"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.","published":"2026-07-15T20:49:15.693Z","modified":"2026-08-12T03:51:32.461337555Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N"},"epss":{"score":0.00357,"percentile":0.2847,"asOf":"2026-08-29"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"9router","fixedVersion":null}],"fix":{"url":"https://github.com/decolua/9router/commit/5e1c1261368e06dced1cbc650684561b2c8844db","label":"decolua/9router@5e1c126"},"references":[{"type":"WEB","url":"https://github.com/decolua/9router/releases/tag/v0.4.46"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49353.json"},{"type":"ADVISORY","url":"https://github.com/decolua/9router/security/advisories/GHSA-6g2f-w7g3-77vf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49353"},{"type":"FIX","url":"https://github.com/decolua/9router/commit/5e1c1261368e06dced1cbc650684561b2c8844db"},{"type":"FIX","url":"https://github.com/decolua/9router/commit/bb86808582067e4fc6f004508a919efb9970d1d5"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:32.461337555Z"}}