CVE-2026-55641
9Router is an AI router & token saver. Prior to 0.5.2, 9router determines whether a /v1 LLM proxy request is local by reading the client-controlled Host header, allowing a remote unauthenticated attacker to send Host: localhost and bypass API-key authentication. In the default configuration, this exposes the /v1 proxy to upstream provider calls using stored provider credentials and allows /v1/search with the searxng provider_options.baseUrl parameter to drive server-side requests to internal or cloud-metadata hosts. This issue is fixed in version 0.5.2.
- Affected products
- 9Router
- Fix
- Available
- CVSS 3.1
- 8.2 HIGH
- EPSS
- 0.2% (16th percentile)
- Weakness
- CWE-918, CWE-290, CWE-1327, CWE-348
- NVD status
- Deferred
- Published
- 2026-07-10
No indexed exploits for CVE-2026-55641 yet
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No exploit for CVE-2026-55641 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.