CVE-2026-49352CWE-798

9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass

Critical · published July 15, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
48.1
In the wild
Unconfirmed
What it is

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

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00601 · 48.1th percentile
Weakness
CWE-798 · Use of Hard-coded Credentials
Published
2026-07-15T20:43Z
EPSS history
Timeline
  • 15 JUL 20:43Z
    9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass
    cvelistv5