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CVE-2026-56676

HIGH
7.4
CVSS 3.1
Description
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.

Metadata

CVE ID
CVE-2026-56676
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-22 16:39 UTC
Published
2026-07-10 15:30 UTC
Last updated
2026-07-10 15:30 UTC
Primary CWE
CWE-367
CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
Vendor / Product
decolua / 9router
Sources
cve.org  ·  NVD

Severity & Metrics

7.4 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
Affected products (1)
VendorProductPlatformVersions
decolua 9router — < 0.5.2
Weakness (CWE)
CWESourceDescription
CWE-367 cna CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition
CWE-918 cna CWE-918: Server-Side Request Forgery (SSRF)
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.4 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L
References (3)
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