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HIGH

CVE-2026-56681

CVSS v3

7.3

HIGH

EPSS Score

1.0 %

exploit probability, as of 2026-09-28

CISA KEV

No

known exploited

Exploitation

—

SSVC status

Description

9Router is an AI router & token saver. Prior to 0.5.6, 9Router deployments that allow requests to reach Next.js without the sanitizing custom-server.js wrapper trust the client-supplied X-9r-Real-Ip header in src/dashboardGuard.js when isLocalRequest decides whether canAccessPublicLlmApi may skip API-key validation for /api/v1/* routes. A remote unauthenticated attacker can set X-9r-Real-Ip to 127.0.0.1 and be classified as a local client, including on the verified GET /api/v1/models route. This

Technical details

Published
2026-09-22
Last Modified
2026-09-22

Frequently asked questions

What is CVE-2026-56681?

9Router is an AI router & token saver. Prior to 0.5.6, 9Router deployments that allow requests to reach Next.js without the sanitizing custom-server.js wrapper trust the client-supplied X-9r-Real-Ip header in src/dashboardGuard.js when isLocalRequest decides whether canAccessPublicLlmApi may skip API-key validation for /api/v1/* routes. A remote unauthenticated attacker can set X-9r-Real-Ip to 127.0.0.1 and be classified as a local client, including on the verified GET /api/v1/models route. This

Is CVE-2026-56681 actively exploited?

Active exploitation of CVE-2026-56681 has not been confirmed. Its EPSS score was 1.0% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-56681?

CVE-2026-56681 has a CVSS v3 base score of 7.3 (HIGH severity).

Is CVE-2026-56681 affecting your environment?

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