decolua 9router up to 0.4.79 Login Rate Limiter loginLimiter.js X-Forwarded-For missing authentication

Summaryinfo

A vulnerability classified as critical has been found in decolua 9router up to 0.4.79. This vulnerability affects unknown code of the file src/lib/auth/loginLimiter.js of the component Login Rate Limiter. Performing a manipulation of the argument X-Forwarded-For results in missing authentication. This vulnerability was named CVE-2026-55501. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in decolua 9router up to 0.4.79. This affects some unknown processing of the file src/lib/auth/loginLimiter.js of the component Login Rate Limiter. The manipulation of the argument X-Forwarded-For with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-55501 since 06/17/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 0.4.80 eliminates this vulnerability.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• decolua

Name

• 9router

Version

• 0.4.0
• 0.4.1
• 0.4.2
• 0.4.3
• 0.4.4
• 0.4.5
• 0.4.6
• 0.4.7
• 0.4.8
• 0.4.9
• 0.4.10
• 0.4.11
• 0.4.12
• 0.4.13
• 0.4.14
• 0.4.15
• 0.4.16
• 0.4.17
• 0.4.18
• 0.4.19
• 0.4.20
• 0.4.21
• 0.4.22
• 0.4.23
• 0.4.24
• 0.4.25
• 0.4.26
• 0.4.27
• 0.4.28
• 0.4.29
• 0.4.30
• 0.4.31
• 0.4.32
• 0.4.33
• 0.4.34
• 0.4.35
• 0.4.36
• 0.4.37
• 0.4.38
• 0.4.39
• 0.4.40
• 0.4.41
• 0.4.42
• 0.4.43
• 0.4.44
• 0.4.45
• 0.4.46
• 0.4.47
• 0.4.48
• 0.4.49
• 0.4.50
• 0.4.51
• 0.4.52
• 0.4.53
• 0.4.54
• 0.4.55
• 0.4.56
• 0.4.57
• 0.4.58
• 0.4.59
• 0.4.60
• 0.4.61
• 0.4.62
• 0.4.63
• 0.4.64
• 0.4.65
• 0.4.66
• 0.4.67
• 0.4.68
• 0.4.69
• 0.4.70
• 0.4.71
• 0.4.72
• 0.4.73
• 0.4.74
• 0.4.75
• 0.4.76
• 0.4.77
• 0.4.78
• 0.4.79

Website

• Product: https://github.com/decolua/9router/

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion