CVE-2026-49352 PUBLISHED

9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass

Assigner: GitHub_M
Reserved: 29.05.2026 Published: 15.07.2026 Updated: 15.07.2026

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

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	decolua
Product	9router
Versions	Version >= 0.2.21, < 0.4.44 is affected

References

https://github.com/decolua/9router/security/advisories/GHSA-jphh-m39h-6gwx
https://github.com/decolua/9router/commit/fe3ce25ae3cda48c0702c2d452e17f6ec214009d
https://github.com/decolua/9router/releases/tag/v0.4.44

Problem Types

CWE-798: Use of Hard-coded Credentials CWE