Critical severityNVD Advisory· Published Jul 15, 2026· Updated Jul 16, 2026
9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass
CVE-2026-49352
Description
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 packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
9routernpm | >= 0.2.21, < 0.4.45 | 0.4.45 |
Affected products
2Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-jphh-m39h-6gwxghsaADVISORY
- github.com/decolua/9router/commit/fe3ce25ae3cda48c0702c2d452e17f6ec214009dmitrex_refsource_MISC
- github.com/decolua/9router/releases/tag/v0.4.44mitrex_refsource_MISC
- github.com/decolua/9router/security/advisories/GHSA-jphh-m39h-6gwxghsax_refsource_CONFIRMWEB
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