CVE-2026-56676
9router: Image prefetch DNS rebinding allows SSRF to internal services
HIGH 7.4EPSS 0.3%
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
- decolua · 9router
- CVSS v3.1 GITHUB
- 7.4 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L - EPSS
- 0.26% chance of exploitation in the next 30 days, 17th percentile
- Published
- 2026-07-10
- Updated
- 2026-07-13