CVE-2026-56676: 9Router is an AI router & token saver. Prior to 0.5.2, 9router validates image URLs by resolving the host before fetching, but…

PriorityP346high7.4CVSS 3.1

AVNACLPRLUINSCCLILAL

EPSS

0.15%

5.0th percentile

9Router is an AI router & token saver. Prior to 0.5.2, 9router validates image URLs by resolving the host before fetching, but open-sse/translator/concerns/image.js performs the later server-side image fetch with a separate DNS resolution. An authenticated attacker with access to the LLM proxy can use a vision-capable model and an attacker-controlled DNS name that first resolves to a public IP and then rebinds to an internal address, allowing server-side requests to internal-only HTTP services. This issue is fixed in version 0.5.2.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
decolua	9router	< 0.5.2	0.5.2

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