CVE-2026-56675: CWE-287: Improper Authentication in decolua 9router
9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that forwards public traffic to the backend through 127.0.0.1 causes src/dashboardGuard.js to misclassify external requests as local. A remote unauthenticated attacker can access /v1 APIs such as /v1/models and may abuse configured upstream provider credentials through /v1 proxy endpoints depending on enabled providers. This issue is fixed in version 0.5.2.
AI Analysis
Technical Summary
The vulnerability in decolua's 9Router before version 0.5.2 involves improper authentication due to the software treating loopback (127.0.0.1) requests as inherently trusted. This allows any requests forwarded through a same-host reverse proxy to access /v1/* API endpoints without requiring an API key. Consequently, a remote unauthenticated attacker can exploit this to access APIs such as /v1/models and potentially misuse configured upstream provider credentials via proxy endpoints. The vulnerability is identified as CWE-287 (Improper Authentication) along with related weaknesses CWE-290, CWE-306, and CWE-441. The issue is fixed in version 0.5.2.
Potential Impact
Remote unauthenticated attackers can bypass authentication controls by exploiting the trust of loopback requests, gaining unauthorized access to sensitive API endpoints. This can lead to information disclosure, unauthorized use of upstream provider credentials, and potential disruption of service. The CVSS 3.1 score is 8.3 (High), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade 9Router to version 0.5.2 or later, where this improper authentication issue is fixed. No other mitigation is specified or required as the fix addresses the root cause.
CVE-2026-56675: CWE-287: Improper Authentication in decolua 9router
Description
9Router is an AI router & token saver. Prior to 0.5.2, 9router treats loopback requests as trusted and allows /v1/* access without an API key, so a same-host reverse proxy that forwards public traffic to the backend through 127.0.0.1 causes src/dashboardGuard.js to misclassify external requests as local. A remote unauthenticated attacker can access /v1 APIs such as /v1/models and may abuse configured upstream provider credentials through /v1 proxy endpoints depending on enabled providers. This issue is fixed in version 0.5.2.
CVSS v3.1
Score 8.3high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in decolua's 9Router before version 0.5.2 involves improper authentication due to the software treating loopback (127.0.0.1) requests as inherently trusted. This allows any requests forwarded through a same-host reverse proxy to access /v1/* API endpoints without requiring an API key. Consequently, a remote unauthenticated attacker can exploit this to access APIs such as /v1/models and potentially misuse configured upstream provider credentials via proxy endpoints. The vulnerability is identified as CWE-287 (Improper Authentication) along with related weaknesses CWE-290, CWE-306, and CWE-441. The issue is fixed in version 0.5.2.
Potential Impact
Remote unauthenticated attackers can bypass authentication controls by exploiting the trust of loopback requests, gaining unauthorized access to sensitive API endpoints. This can lead to information disclosure, unauthorized use of upstream provider credentials, and potential disruption of service. The CVSS 3.1 score is 8.3 (High), reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and impacts on confidentiality, integrity, and availability.
Mitigation Recommendations
Upgrade 9Router to version 0.5.2 or later, where this improper authentication issue is fixed. No other mitigation is specified or required as the fix addresses the root cause.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-22T16:39:01.044Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a511ed668715ace43d689fb
Added to database: 07/10/2026, 16:33:26 UTC
Last enriched: 07/10/2026, 16:47:36 UTC
Last updated: 07/10/2026, 17:18:19 UTC
Views: 4
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