CVE-2026-55501: Decolua 9Router login rate limit bypass via X-Forwarded-For spoofing

CVE-2026-55501 · Severity: high · CVSS 7.3 · Published 2026-07-10

9Router, an AI-powered router and token management tool, contains a flaw in its login security system. Attackers can bypass the 'too many failed attempts' lockout mechanism by spoofing their network identity, allowing them to make unlimited password guesses. If successful, an attacker could gain full administrative control over the router, potentially exposing API keys and sensitive configuration data.

Technologies: 9router (npm). Vendors: npm.

Quick answers

Is CVE-2026-55501 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-55501 being exploited in the wild.
How severe is CVE-2026-55501?
High severity, with a CVSS score of 7.3, published 10 July 2026.
Which products and versions are affected?
9router (npm) <= 0.4.71, SEMVER:introduced=0,fixed=0.4.77.
Is there a fix for CVE-2026-55501?
Yes. 9router (npm): upgrade to 0.4.77 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-55501 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-55501?
Check whether you run 9router (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • 9router (npm): upgrade to 0.4.77 or later
    npm install 9router@0.4.77

Technical details

A rate limit bypass exists in 9Router prior to version 0.4.80 due to improper client identity derivation. The `getClientIp` function in `src/lib/auth/loginLimiter.js` prioritizes the `X-Forwarded-For` HTTP header without verifying if the request originated from a trusted proxy. By rotating the value of this header in each request, a remote, unauthenticated attacker can ensure every login attempt is assigned to a fresh rate-limit bucket. This effectively bypasses the 5-attempt threshold and progressive lockout durations, enabling high-speed brute-force attacks against the dashboard. The vulnerability is remediated in version 0.4.80 by implementing a custom server that strips client-supplied forwarding headers and uses unspoofable socket IPs.

Affected products

  • decolua 9router < 0.4.80

Identifiers

  • CVE-2026-55501
  • GHSA-7cfm-pqrj-xgq7

Timeline

  • 2026-06-08: patched: Fix committed to repository
  • 2026-06-13: advisory: Version 0.4.80 released
  • 2026-06-20: advisory: GitHub Security Advisory published
  • 2026-07-10: disclosed: CVE published to NVD

References

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