CVE-2026-55638 | 9Router is an AI router & token saver. Prior to 0.5.2, 9rout… | CVSS 8.6 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-55638
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-16 23:52 UTC
Published: 2026-07-10 15:38 UTC
Last updated: 2026-07-10 16:46 UTC
Primary CWE: CWE-862
CWE-862: Missing Authorization
Vendor / Product: decolua / 9router
Sources: cve.org · NVD

Severity & Metrics

8.6 HIGH CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
decolua	9router	—	< 0.5.2

Weakness (CWE)

CWE	Source	Description
CWE-862	cna	CWE-862: Missing Authorization
CWE-863	cna	CWE-863: Incorrect Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.6	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References (3)

https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r https://github.com/decolua/9router/security/advisories/GHSA-8gmq-j984-vp4r
https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3 https://github.com/decolua/9router/commit/b282f0554972ea35281520738759d76abcd0b0b3
https://github.com/decolua/9router/releases/tag/v0.5.2 https://github.com/decolua/9router/releases/tag/v0.5.2