Vulnerability in Decolua 9router
CVE-2026-56682
9Router is an AI router & token saver. Prior to 0.5.6, 9Router deployments that allow requests to reach Next.js without the sanitizing custom-server.js wrapper use the client-supplied X-9r-Real-Ip value as the bucket key in getClientIp, checkLock, and recordFail in src/lib/auth/loginLimiter.js for POST /api/auth/login. A remote unauthenticated attacker can rotate the header on every password guess so each request uses a new failed-attempt bucket and the five-attempt progressive lockout never returns HTTP 429. This permits unthrottled password guessing against the dashboard login and can lead to an administrative session if the password is recovered. This issue is fixed in version 0.5.6.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Decolua 9router — versions < 0.5.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-56682?
- CVE-2026-56682 is a medium-severity vulnerability in Decolua 9router, classified under Improper Restriction of Excessive Authentication Attempts. CVSS score: 5.3/10. Published 2026-09-22.
- How severe is CVE-2026-56682?
- Medium severity. CVSS v3 base score is 5.3 out of 10.