EUVD-2026-44812Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Network-reachable endpoint needs a low-privilege authenticated account (PR:L, AC:L); disabling auth exposes secrets (C:H) and mutates persistent settings (I:H), with minor availability effect (A:L).
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionCVE.org
9Router is an AI router & token saver. Prior to 0.5.4, the PATCH /api/settings endpoint writes the entire request body to persistent settings without a field whitelist, allowing an authenticated user to set security-critical fields such as requireLogin and disable authentication for the whole application, exposing protected routes such as /api/keys and /api/providers to unauthenticated access. This issue is reported as fixed in version 0.5.4.
AnalysisAI
Authentication bypass in 9Router (AI router & token saver) prior to 0.5.4 lets any authenticated user disable application-wide login by abusing a mass-assignment flaw in the PATCH /api/settings endpoint. Because the endpoint persists the entire request body without a field whitelist, a low-privileged user can flip security-critical settings such as requireLogin, thereby exposing sensitive routes like /api/keys and /api/providers to unauthenticated access. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a valid authenticated 9Router session (PR:L) able to reach the PATCH /api/settings endpoint over the network; the specific enabling condition is that this endpoint writes the entire request body to persistent settings with no field whitelist, so the attacker must be able to include security-critical fields such as requireLogin in the body. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L, base 8.7 High) indicates a network-reachable, low-complexity attack requiring only a single low-privilege authenticated session and no user interaction - a realistic bar in multi-user or shared deployments. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who holds any ordinary authenticated 9Router account sends a single PATCH /api/settings request whose JSON body includes requireLogin set to false (or similar auth-disabling fields). The server persists the whole body, authentication is switched off application-wide, and the attacker - or anyone on the network - can then read /api/keys and /api/providers without credentials to harvest stored AI provider API keys. … |
| Remediation | Vendor-released patch: upgrade to 9Router 0.5.4, which reportedly fixes the mass-assignment flaw; this is the primary and recommended action (see https://github.com/decolua/9router/security/advisories/GHSA-vmjq-hvgq-2wv4). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running 9Router versions prior to 0.5.4 and plan upgrade to version 0.5.4 or later. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Unauthenticated CRUD on the provider-management API in 9Router (through 0.4.41) lets remote attackers with no credential
Remote authorization bypass in decolua 9router up to version 0.3.47 allows unauthenticated network attackers to access t
Unauthenticated API key disclosure in 9Router (npm package '9router' by decolua) through version 0.4.41 lets any remote
Authenticated remote code execution in 9Router before 0.5.2 lets a logged-in attacker run arbitrary OS commands on the h
Unauthenticated information disclosure in 9Router (decolua/9router) through version 0.4.41 lets remote attackers read ev
Authorization-gate bypass in 9Router (decolua/9router) before 0.5.2 lets a remote unauthenticated attacker reach protect
Authentication bypass in 9Router (decolua/9router) versions prior to 0.5.2 lets remote unauthenticated attackers reach p
Authentication bypass in 9Router (decolua/9router) before 0.5.2 lets a remote unauthenticated attacker forge a 'Host: lo
Server-side request forgery via DNS rebinding in 9Router (decolua/9router) before 0.5.2 allows an authenticated LLM-prox
Server-side request forgery (SSRF) in 9Router's Kiro API-key validation endpoint allows authenticated attackers to redir
Improper authorization in decolua 9router through version 0.4.0 allows remote attackers with low privileges to bypass JW
Same technique Information Disclosure
View allShare
External POC / Exploit Code
Leaving vuln.today