CVE-2026-49352 json
9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass
published 2026-07-02 4 mo ago modified 2026-10-24 15 d ago also GHSA-jphh-m39h-6gwx , EUVD-2026-44809
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- npm 9router 0.4.45
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 3 mo ago
Exploit prediction
0.60% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/decolua/9router/security/advisories/GHSA-jphh-m39h-6gwx referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | 9router | >=0.2.21, <0.4.45 |
0.4.45 |
Affected products
- decolua 9router
Classification
- Weakness
-
- CWE-798 Use of Hard-coded Credentials
References
Sources
- CVE List CVE-2026-49352
- GitHub Advisory GHSA-jphh-m39h-6gwx
- NVD CVE-2026-49352
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