User Impersonation Affecting 9router package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-9ROUTER-17817940
- published5 Jul 2026
- disclosed2 Jul 2026
- creditUnknown
Introduced: 2 Jul 2026
NewCVE-2026-49353 (opens in a new tab)How to fix?
There is no fixed version for 9router.
Overview
9router is a 9Router CLI - Start and manage 9Router server
Affected versions of this package are vulnerable to User Impersonation via the isLocalRequest function. An attacker can gain unauthorized access to restricted routes and interact with child processes by spoofing the Host and Origin headers when the application is deployed behind a reverse proxy or tunnel, and by obtaining or predicting the deterministic CLI token derived from the machine ID. This is only exploitable if the application is deployed behind a proxy or tunnel and the attacker can obtain or guess the machine ID used for token generation.