CVE-2026-59801 | 9Router through version 0.4.41 contains an unauthenticated a… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-59801
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-07-07 14:39 UTC
Published: 2026-07-13 21:30 UTC
Last updated: 2026-07-13 21:30 UTC
Primary CWE: CWE-306
Missing Authentication for Critical Function
Vendor / Product: decolua / 9Router
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products (1)

Vendor	Product	Platform	Versions
decolua	9Router	—	0 ≤ 0.4.41

Weakness (CWE)

CWE	Source	Description
CWE-306	cna	Missing Authentication for Critical Function

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (2)

GitHub Security Advisory (GHSA-vjc7-jrh9-9j86) https://github.com/decolua/9router/security/advisories/GHSA-vjc7-jrh9-9j86
VulnCheck Advisory: 9Router 0.4.41 - Unauthenticated API Exposure via /api/providers https://www.vulncheck.com/advisories/9router-unauthenticated-api-exposure-via-api-providers