---
cve: "CVE-2026-55641"
severity: "HIGH"
cvss: 8.2
epss: "0.3%"
vendor: "decolua"
kev: false
exploited: false
published: "2026-07-10 17:16:59"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-25T19:55:57+02:00"
---

# CVE-2026-55641

> 8.2 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Gering | warn |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- b282f0554972ea35281520738759d76abcd0b0b3 (Commit)
- 5da508af3c3dc6e920286141d1a4ddcd4ec245db (Commit)

## Referenzen

- <https://github.com/decolua/9router/security/advisories/GHSA-86m2-fcxq-5q7c>
- <https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3>
- <https://github.com/decolua/9router/releases/tag/v0.5.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55641) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_