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TI-2026-40053 Aliases CVE-2026-55501GHSA-7cfm-pqrj-xgq7

9router: Login brute-force protection bypass via spoofed X-Forwarded-For header

Priority HIGH 71CWE-307Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-307.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00379 32nd percentileScored 2026-11-07
Fix Fixed 9router (decolua): 0.4.809router (npm): 0.4.77

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
decolua9routerbefore 0.4.800.4.80Patch availableCNA
—9router (npm)before 0.4.770.4.77Patch availableGHSA-7cfm-pqrj-xgq7
  • 9router Vendordecolua Affected before 0.4.80 Fixed in 0.4.80 Patch available CNA
  • 9router (npm) Vendor— Affected before 0.4.77 Fixed in 0.4.77 Patch available GHSA-7cfm-pqrj-xgq7

Remediation

  • Fix · CNA 9router (decolua) Fixed in 0.4.80
  • Fix · GHSA-7cfm-pqrj-xgq7 9router (npm) Fixed in 0.4.77 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-55501
  2. 2026-10-03 Alias added: GHSA-7cfm-pqrj-xgq7

References

Other 4

  • TI-2026-36526 9Router: Hardcoded Default fallback JWT Secret Allows Authentication Bypass CVSS 3.1CRITICAL 9.8
  • TI-2026-34059 9Router: Unauthenticated Remote Code Execution via unprotected MCP custom plugin routes CVSS 3.1CRITICAL 10.0
  • TI-2026-44499 9Router 0.4.41 - Unauthenticated API Key Exposure via /api/usage/stats CVSS 4.0CRITICAL 9.3
  • TI-2026-42622 9Router 0.4.41 - Unauthenticated API Exposure via /api/providers CVSS 4.0CRITICAL 9.3
  • TI-2026-44500 9Router 0.4.41 - Unauthenticated Information Disclosure via API Usage Endpoints CVSS 4.0HIGH 8.7
  • TI-2026-40860 9Router: Authenticated Server-Side Request Forgery (SSRF) via OIDC Provider Test Endpoint CVSS 3.1HIGH 8.6
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences