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 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.

CVSS v3 7.4 HIGH

7.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 3.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/decolua/9router/commit/c7d07448c58bec1200741de0b73305b860416b82
https://github.com/decolua/9router/releases/tag/v0.5.2
https://github.com/decolua/9router/security/advisories/GHSA-cmhj-wh2f-9cgx
https://github.com/decolua/9router/security/advisories/GHSA-cmhj-wh2f-9cgx

Configurations

No configuration.

History

No history.

Information

Published : 2026-07-10 16:16

Updated : 2026-07-13 19:17

NVD link : CVE-2026-56676

Mitre link : CVE-2026-56676

CVE.ORG link : CVE-2026-56676

JSON object : View

Products Affected

No product.

CWE

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

CWE-918

Server-Side Request Forgery (SSRF)

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