CVE-2026-56677

9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint

State: Published
Severity: 8.6 High
Published: Aug 17, 2026
Updated: Aug 18, 2026
Reserved: Jun 22, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.6 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L	GitHub_M

Weaknesses

CWE-306 Missing Authentication for Critical Function
CWE-918 Server-Side Request Forgery (SSRF)

Affected Products

Product	Versions
9routerdecolua	<= 0.5.4Affected

References

https://github.com/decolua/9router/security/advisories/GHSA-8g4w-4ffg-8vgx

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