CVE-2026-56676
7.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| decolua | 9router | < 0.5.2 | affected |
Weaknesses
- CWE-367: CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
- CWE-918: CWE-918: Server-Side Request Forgery (SSRF)
References
- https://github.com/decolua/9router/security/advisories/GHSA-cmhj-wh2f-9cgx
- https://github.com/decolua/9router/commit/c7d07448c58bec1200741de0b73305b860416b82
- https://github.com/decolua/9router/releases/tag/v0.5.2
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