Vulnerability Description
9Router is an AI router & token saver. In 0.5.4 and earlier, the POST /api/auth/oidc/test endpoint in src/app/api/auth/oidc/test/route.js passes the user-controlled issuerUrl parameter to fetchOidcDiscovery() in src/lib/auth/oidc.js without restricting private or loopback destinations, allowing unauthenticated attackers when dashboard login is disabled to scan internal services and reflect OIDC discovery fields including token_endpoint and jwks_uri.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/decolua/9router/security/advisories/GHSA-8g4w-4ffg-8vgx
- https://github.com/decolua/9router/security/advisories/GHSA-8g4w-4ffg-8vgx
FAQ
What is CVE-2026-56677?
CVE-2026-56677 is a vulnerability with a CVSS score of 8.6 (HIGH). 9Router is an AI router & token saver. In 0.5.4 and earlier, the POST /api/auth/oidc/test endpoint in src/app/api/auth/oidc/test/route.js passes the user-controlled issuerUrl parameter to fetchOidcDis...
How severe is CVE-2026-56677?
CVE-2026-56677 has been rated HIGH with a CVSS base score of 8.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56677?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.