CVE-2026-56676

9router is affected by an image prefetch DNS rebinding vulnerability (CVE-2026-56676). Prior to v0.5.2, the application validates the image URL by DNS resolution but then performs a server-side fetch with a separate DNS lookup, enabling an authenticated attacker with access to the LLM proxy to tr...

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 later server-side image fetch with a separate DNS resolution. An authenticated attacker with access to the LLM proxy ca...