by Kastro
Paper/Archive/CVE-2026-49352

CVE-2026-49352

decolua 9router — 9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass

EPSS 0.6%public exploitCVSS 9.8
critical.is priorityof 100
49
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 48.8.488 × 209.8Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

9Router is an AI router & token saver. From 0.2.21 until 0.4.44, 9Router used the hardcoded fallback JWT secret 9router-default-secret-change-me in src/app/api/auth/login/route.js, src/middleware.js, and later src/lib/auth/dashboardSession.js, allowing attackers to forge an auth_token cookie when JWT_SECRET was unset. This issue is fixed in version 0.4.44

Affected

ProductAffectedFixed inSource
9router>= 0.2.21, < 0.4.44–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/decolua/9router/security/advisories/GHSA-jphh-m39h-6gwxrefgithub.com/decolua/9router/commit/fe3ce25ae3cda48c0702c2d452e17f6ec214009drefgithub.com/decolua/9router/releases/tag/v0.4.44