Description
9Router through version 0.4.41 contains an unauthenticated access vulnerability that allows remote attackers to interact with provider management API endpoints by sending requests without any credentials due to missing authentication middleware in the Next.js API routes under src/app/api/providers/*. Attackers can enumerate, create, modify, or delete provider connections to expose partial credentials, OAuth tokens, and API keys, redirect AI traffic to attacker-controlled servers, or cause complete denial of service by deleting all provider connections.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| decolua | 9Router | ≤ 0.4.41 | — |
Automated scanner template
A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.
- 9Router - Unauthenticated LLM Provider API Exposure http/cves/2026/CVE-2026-59801.yaml
Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | 9router | <= 0.4.41 | — | GHSA-vjc7-jrh9-9j86 |
References
- GitHub Security Advisory (GHSA-vjc7-jrh9-9j86) vendor-advisory
- VulnCheck Advisory: 9Router 0.4.41 - Unauthenticated API Exposure via /api/providers third-party-advisory