What is CVE-2026-55638?

CVE-2026-55638 is a high-severity vulnerability in Decolua 9router, classified under Missing Authorization. CVSS score: 8.6/10. Published 2026-07-10.

How severe is CVE-2026-55638?

High severity. CVSS v3 base score is 8.6 out of 10.

Auth bypass in Decolua 9router

CVE-2026-55638

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 unauthenticate…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H.

Affected products

Decolua 9router — versions < 0.5.2

Weakness classification (CWE)

CWE-862 — Missing Authorization
CWE-863 — Incorrect Authorization

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-55638?: CVE-2026-55638 is a high-severity vulnerability in Decolua 9router, classified under Missing Authorization. CVSS score: 8.6/10. Published 2026-07-10.
How severe is CVE-2026-55638?: High severity. CVSS v3 base score is 8.6 out of 10.