by Kastro
Paper/Archive/CVE-2026-59801

CVE-2026-59801

decolua 9Router — 9Router 0.4.41 - Unauthenticated API Exposure via /api/providers

EPSS 3%public exploitCVSS 9.8
critical.is priorityof 100
57
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 85.5.855 × 2017.1Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
9Router≤ 0.4.41–CNA

Scores by source

VulnCheck (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/decolua/9router/security/advisories/GHSA-vjc7-jrh9-9j86writeupvulncheck.com/advisories/9router-unauthenticated-api-exposure-via-api-providers