CVE-2026-55501
9router: Login brute-force protection bypass via spoofed X-Forwarded-For header
Description
9Router is an AI router & token saver. Prior to 0.4.80, the dashboard login rate limiter in src/lib/auth/loginLimiter.js derives the client identity from the attacker-controlled X-Forwarded-For HTTP header, and src/app/api/auth/login/route.js uses that spoofable value for checkLock and recordFail. A remote attacker can rotate the X-Forwarded-For value on each login attempt to receive a fresh rate-limit bucket, bypass the 5-attempt threshold and progressive lockout durations, and perform unlimited brute-force attempts against the dashboard password. This issue is fixed in version 0.4.80.
INFO
Published Date :
July 10, 2026, 4:16 p.m.
Last Modified :
Oct. 25, 2026, 3:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-55501
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Update 9Router to version 0.4.80.
- Avoid trusting X-Forwarded-For for rate limiting.
- Implement robust IP address validation.
- Enforce strict authentication policies.
Public PoC/Exploit Available at Github
CVE-2026-55501 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-55501.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-55501 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-55501
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-55501 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-55501 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 25, 2026
Action Type Old Value New Value Added Translation Title: 9router de decolua, Description: 9Router es un router de IA y ahorrador de tokens. Antes de la versión 0.4.80, el limitador de velocidad de inicio de sesión del panel de control en src/lib/auth/loginLimiter.js deriva la identidad del cliente del encabezado HTTP X-Forwarded-For controlado por el atacante, y src/app/api/auth/login/route.js utiliza ese valor falsificable para checkLock y recordFail. Un atacante remoto puede rotar el valor de X-Forwarded-For en cada intento de inicio de sesión para recibir un nuevo cubo de límite de velocidad, eludir el umbral de 5 intentos y las duraciones de bloqueo progresivas, y realizar intentos ilimitados de fuerza bruta contra la contraseña del panel de control. Este problema está solucionado en la versión 0.4.80. -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 10, 2026
Action Type Old Value New Value Added Reference https://github.com/decolua/9router/security/advisories/GHSA-7cfm-pqrj-xgq7 Added SSVC {'id': 'CVE-2026-55501', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'yes'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-07-10T16:44:55.006800Z'} -
New CVE Received by [email protected]
Jul. 10, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'decolua', 'product': '9router', 'versions': [{'status': 'affected', 'version': '< 0.4.80'}]}] Added Description 9Router is an AI router & token saver. Prior to 0.4.80, the dashboard login rate limiter in src/lib/auth/loginLimiter.js derives the client identity from the attacker-controlled X-Forwarded-For HTTP header, and src/app/api/auth/login/route.js uses that spoofable value for checkLock and recordFail. A remote attacker can rotate the X-Forwarded-For value on each login attempt to receive a fresh rate-limit bucket, bypass the 5-attempt threshold and progressive lockout durations, and perform unlimited brute-force attempts against the dashboard password. This issue is fixed in version 0.4.80. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Added CWE CWE-307 Added Reference https://github.com/decolua/9router/commit/7648c3412b403a29f04967c4b4e9725e228791d4 Added Reference https://github.com/decolua/9router/releases/tag/v0.4.80 Added Reference https://github.com/decolua/9router/security/advisories/GHSA-7cfm-pqrj-xgq7