SEPTEMBER 19, 2026
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Case File

CVE-2026-55641

HIGH · CVSS 8.2 EPSS 0.25% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-10 · Last synced 2026-08-09

CyberRota Analysis

AI-Generated

The 9Router AI router is vulnerable due to improper handling of the client-controlled Host header, which allows remote unauthenticated attackers to bypass API-key authentication and access sensitive internal resources. This can lead to unauthorized server-side requests using stored provider credentials, potentially exposing sensitive data. Organizations utilizing versions prior to 0.5.2 should prioritize immediate updates to mitigate this high-severity risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55641
Severity
HIGH
CVSS
8.2
EPSS
0.25%

Original NVD Description

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.