CVE-2026-49352

CriticalCVSS 9.8

Published: 15/07/2026(UTC)Updated: 16/07/2026(UTC)Translated: 17/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.60%

45th percentile - higher than 45% of all known CVEs

Summary

In 9Router versions 0.2.21 through 0.4.44, a hardcoded fallback JWT secret '9router-default-secret-change-me' was used, allowing attackers to forge an auth_token cookie when JWT_SECRET is unset. The issue is fixed in version 0.4.44.

Risk Assessment

An attacker can impersonate any user, gaining unauthorized access to the system and potentially taking over administrative sessions.

Recommendation

Immediately upgrade 9Router to version 0.4.44 or later and ensure the JWT_SECRET environment variable is set to a strong, unique secret.

Original NVD description (English source)

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