What’s Vulnerable › Vulnerabilities

CVE-2026-56676: 9router: Image prefetch DNS rebinding allows SSRF to internal services

• Severity: high (CVSS 7.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-10 · updated 2026-10-25
• Weakness: CWE-367

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.

Affected products

• decolua 9router: before 0.5.2

References

• 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

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