CVE-2026-56676 — 9router: Image prefetch DNS rebinding allows SSRF to internal services
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…
Published: 2026-07-10 · CVSS: 7.4 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7