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9Router EUVDEUVD-2026-60471

| CVE-2026-56677 HIGH
Missing Authentication for Critical Function (CWE-306)
2026-08-17 GitHub_M GHSA-8g4w-4ffg-8vgx
8.6
CVSS 3.1 · Vendor: GitHub_M
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Identify unauthenticated /api/auth/oidc/test endpoint
  2. Delivery
    Craft POST request with internal issuerUrl
  3. Exploit
    9Router fetches target's OIDC discovery document
  4. Execution
    Internal service response reflected to attacker
  5. Persist
    Enumerate internal hosts and ports
  6. Impact
    Map internal network topology

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Exploitation requires that 9Router's dashboard login feature is explicitly disabled - this is the stated precondition and the basis for CWE-306 classification; when dashboard authentication is enabled, the endpoint is not accessible to unauthenticated callers. The attacker must also have network-level access to the 9Router service port. No additional configuration, special protocol, or software state is required beyond those two conditions. What limits exploitation: deployments with dashboard auth enabled are not exposed; the vulnerability produces information disclosure of internal service metadata rather than direct code execution or data exfiltration of application secrets; scope is unchanged (S:U), so compromise does not automatically pivot to other systems without additional steps.

Impact

The NVD-assigned CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L) yields a score of 8.6, but the I:H metric warrants scrutiny - the described behavior is SSRF with information reflection, not direct data modification. High integrity impact is not substantiated by the description alone and may overstate the base score; realistic impact is low-to-moderate confidentiality (internal service discovery) with minimal direct integrity consequence unless the fetched OIDC metadata is subsequently used to manipulate authentication trust. EPSS data is not available in the provided intelligence, and the CVE is not listed in CISA KEV, indicating no confirmed active exploitation at time of analysis. The critical enabling condition - dashboard login being disabled - limits exposure to deployments that have explicitly or inadvertently removed authentication from the dashboard. This is a meaningful constraint, though self-hosted AI-proxy deployments running in trusted internal environments may commonly operate without dashboard auth. No POC has been identified. Real-world priority is moderate: niche product, conditional prerequisite, but trivially exploitable network enumeration once conditions are met.

Exploit ScenarioDerived

An attacker with network access to an unauthenticated 9Router instance sends a POST request to /api/auth/oidc/test with an issuerUrl set to an internal address such as http://192.168.1.10:8080. The server fetches http://192.168.1.10:8080/.well-known/openid-configuration and returns the response body, allowing the attacker to confirm whether the internal host is live and extract any OIDC metadata fields it exposes. By iterating over internal IP ranges and ports, the attacker maps the internal service landscape without requiring credentials. No public POC has been identified, but the attack requires only standard HTTP tooling given the low complexity.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 17, 2026

Server-Side Request Forgery (SSRF) in 9Router 0.5.4 and earlier allows unauthenticated remote attackers to probe internal network services by supplying an arbitrary issuerUrl to the /api/auth/oidc/test endpoint, which the application fetches without validating against private or loopback address ranges. The reflected OIDC discovery fields - including token_endpoint and jwks_uri - expose internal service metadata, enabling internal network enumeration. No public exploit code or CISA KEV listing has been identified at time of analysis, though the unauthenticated, low-complexity attack surface makes opportunistic scanning plausible.

RemediationAI

Consult the vendor advisory at https://github.com/decolua/9router/security/advisories/GHSA-8g4w-4ffg-8vgx for an official patched release; no exact fix version is confirmed in the available intelligence, so monitor the decolua/9router repository for a release beyond 0.5.4. As a compensating control, enforce dashboard authentication to remove the unauthenticated exposure of the /api/auth/oidc/test endpoint - this is the most direct mitigation and eliminates the CWE-306 condition described. If dashboard auth cannot be enabled, restrict network access to the 9Router service so that the /api/auth/oidc/test endpoint is unreachable from untrusted hosts using a firewall or reverse-proxy ACL; note this does not fix the underlying SSRF but reduces attack surface. In the application code, implement an allowlist or private-IP deny-list inside fetchOidcDiscovery() to block resolution of RFC-1918 and loopback destinations - this is the root technical fix regardless of auth state.

Affected VersionsENISA

9router ≤ 0.5.4

Affected Packages

npm 9router no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in npm

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

9Router is an AI prompt-routing and token-saving proxy maintained by decolua (CPE: cpe:2.3:a:decolua:9router:*:*:*:*:*:*:*:*). The vulnerable endpoint - POST /api/auth/oidc/test defined in src/app/api/auth/oidc/test/route.js - accepts a user-supplied issuerUrl and forwards it to fetchOidcDiscovery() in src/lib/auth/oidc.js, which performs an HTTP GET to the supplied URL's /.well-known/openid-configuration path. Because no deny-list or allowlist filters private RFC-1918 ranges (10.x, 172.16-31.x, 192.168.x) or loopback (127.0.0.1, ::1), the server acts as an HTTP proxy into its own internal network. The root cause is classified as CWE-306 (Missing Authentication for Critical Function): the endpoint performs a sensitive outbound network operation but enforces no authentication when the dashboard login feature is disabled, making it openly reachable to any unauthenticated caller on the network.

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Severity by source

Vendor (GitHub_M) PRIMARY 8.6 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:L
vuln.today AI 5.3 MEDIUM

SSRF yields internal service enumeration (C:L); no direct data modification or availability impact is described, so I and A are N; PR:N reflects the unauthenticated condition when dashboard login is disabled.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low

DescriptionCVE.org

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.

Executive ViewAI

Why It Matters

9Router versions 0.5.4 and earlier contain an unauthenticated server-side request forgery (SSRF) vulnerability that enables attackers to enumerate internal network services and extract sensitive identity infrastructure metadata without authentication. Organizations deploying 9Router for OIDC-based authentication face immediate reconnaissance risk, as attackers can map internal service topology and credential endpoints to facilitate lateral movement and targeted compromise.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations: restrict /api/auth/oidc/test endpoint access via network ACLs or Web Application Firewall to authenticated users only; segment internal networks to limit service exposure reachable from the vulnerable endpoint; implement alerting on abnormal OIDC discovery queries from external sources and monitor for metadata exfiltration patterns.

Threat Intelligence Overview

EPSS Score
0.3%
Top 81% exploitable
Prevalence
Rare
obscure open-source AI-proxy project, minimal enterprise footprint
Threat Intel
1
1 source
Exploit
POC
Public exploit code exists
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS Vulnrichment GHSA GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC Yes
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Out-of-Cycle
Exploitation
Poc
System Exposure· derived
Open
Automatable
Yes
Human Impact
High
Technical Impact
Partial

Priority Score

63
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +43
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

CVE-2026-59801 CRITICAL POC
9.3 Jul 13

Unauthenticated CRUD on the provider-management API in 9Router (through 0.4.41) lets remote attackers with no credential

CVE-2026-56681 HIGH POC
7.3 Sep 22

Authentication bypass in 9Router (npm package '9router') before 0.5.6 lets a remote, unauthenticated attacker reach the

CVE-2026-63732 CRITICAL
9.4 Jul 23

Remote unauthenticated code execution in 9router 0.4.59 (by decolua) lets an attacker chain three flaws - a hardcoded de

CVE-2026-5842 MEDIUM POC
5.5 Apr 09

Remote authorization bypass in decolua 9router up to version 0.3.47 allows unauthenticated network attackers to access t

CVE-2026-56682 MEDIUM POC
5.3 Sep 22

Improper restriction of excessive authentication attempts (CWE-307) in the 9Router AI router package (decolua/9router) b

CVE-2026-62327 CRITICAL
9.3 Jul 13

Unauthenticated API key disclosure in 9Router (npm package '9router' by decolua) through version 0.4.41 lets any remote

CVE-2026-62312 HIGH
8.8 Jul 15

Authenticated remote code execution in 9Router before 0.5.2 lets a logged-in attacker run arbitrary OS commands on the h

CVE-2026-62328 HIGH
8.7 Jul 13

Unauthenticated information disclosure in 9Router (decolua/9router) through version 0.4.41 lets remote attackers read ev

CVE-2026-56679 HIGH POC
8.7 Jul 15

Authentication bypass in 9Router (AI router & token saver) prior to 0.5.4 lets any authenticated user disable applicatio

CVE-2026-55638 HIGH POC
8.6 Jul 10

Authorization-gate bypass in 9Router (decolua/9router) before 0.5.2 lets a remote unauthenticated attacker reach protect

CVE-2026-63313 HIGH
8.3 Jul 23

Server-side request forgery in 9Router before 0.4.72 lets an authenticated (PR:L) or locally-connected user abuse the /v

CVE-2026-56675 HIGH POC
8.3 Jul 10

Authentication bypass in 9Router (decolua/9router) versions prior to 0.5.2 lets remote unauthenticated attackers reach p

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