CVE-2026-55638
HIGH9router: Unauthenticated LLM proxy access via /codex rewrite authorization bypass
Title source: cnaDescription
9Router is an AI router & token saver. Prior to 0.5.2, 9router protects /v1, /v1beta, /api/v1, and /api/v1beta in src/dashboardGuard.js but omits /codex before next.config.mjs rewrites /codex/* to /api/v1/responses. A remote unauthenticated attacker can send requests to /codex/* to bypass the API-key gate and cause the server to make upstream provider calls using operator-stored LLM provider credentials. This issue is fixed in version 0.5.2.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r
X_Refsource_Misc x_refsource_misc
https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3
X_Refsource_Misc x_refsource_misc
https://github.com/decolua/9router/releases/tag/v0.5.2
Scores
CVSS v3
8.6
EPSS
0.0037
EPSS Percentile
29.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-862
CWE-863
Status
published
Products (1)
decolua/9router
< 0.5.2
Published
Jul 10, 2026
Tracked Since
Jul 10, 2026