decolua 9Router up to 0.5.4 OIDC Discovery src/lib/auth/oidc.js fetchOidcDiscovery issuerUrl server-side request forgery

Summaryinfo

A vulnerability was found in decolua 9Router up to 0.5.4. It has been classified as problematic. This affects the function fetchOidcDiscovery of the file src/lib/auth/oidc.js of the component OIDC Discovery. This manipulation of the argument issuerUrl causes server-side request forgery. The identification of this vulnerability is CVE-2026-56677. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in decolua 9Router up to 0.5.4 and classified as problematic. Affected by this vulnerability is the function fetchOidcDiscovery of the file src/lib/auth/oidc.js of the component OIDC Discovery. The manipulation of the argument issuerUrl with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-56677 since 06/22/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/17/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Router Operating System

Vendor

• decolua

Name

• 9Router

Version

• 0.5.0
• 0.5.1
• 0.5.2
• 0.5.3
• 0.5.4

Website

• Product: https://github.com/decolua/9router/

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