CVE-2026-56678: CWE-20: Improper Input Validation in decolua 9router
CVE-2026-56678 is an improper input validation vulnerability in decolua 9router versions prior to 0.5.6. The issue occurs in the Kiro API-key validation endpoint, where a user-controlled region value is used to build an upstream URL. An authenticated attacker can supply a crafted region value to redirect the validation request to an attacker-controlled host, leaking the Kiro API key in the Authorization header. This vulnerability is fixed in version 0.5.6.
AI Analysis
Technical Summary
The vulnerability in decolua 9router (CVE-2026-56678) involves improper input validation (CWE-20) in the Kiro API-key validation endpoint POST /api/oauth/kiro/api-key. Prior to version 0.5.6, the endpoint constructs an upstream URL using a user-supplied region parameter without proper sanitization. An authenticated attacker can exploit this by providing a malicious region string (e.g., kiro-canary.local:8443#) that causes the system to send the API key validation request to an attacker-controlled host. This results in the disclosure of the Kiro API key via the Authorization header. The vulnerability is resolved in version 0.5.6.
Potential Impact
An authenticated attacker can cause 9router to send the Kiro API key validation request to a host under their control, leading to the disclosure of the API key. This compromises the confidentiality and integrity of the API key, potentially allowing unauthorized access to services relying on that key. There is no direct availability impact reported.
Mitigation Recommendations
Upgrade decolua 9router to version 0.5.6 or later, where this vulnerability is fixed. Patch status is confirmed by the vendor stating the fix is included in version 0.5.6. No additional mitigations are indicated.
CVE-2026-56678: CWE-20: Improper Input Validation in decolua 9router
Description
CVE-2026-56678 is an improper input validation vulnerability in decolua 9router versions prior to 0.5.6. The issue occurs in the Kiro API-key validation endpoint, where a user-controlled region value is used to build an upstream URL. An authenticated attacker can supply a crafted region value to redirect the validation request to an attacker-controlled host, leaking the Kiro API key in the Authorization header. This vulnerability is fixed in version 0.5.6.
CVSS v3.1
Score 6.4medium
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in decolua 9router (CVE-2026-56678) involves improper input validation (CWE-20) in the Kiro API-key validation endpoint POST /api/oauth/kiro/api-key. Prior to version 0.5.6, the endpoint constructs an upstream URL using a user-supplied region parameter without proper sanitization. An authenticated attacker can exploit this by providing a malicious region string (e.g., kiro-canary.local:8443#) that causes the system to send the API key validation request to an attacker-controlled host. This results in the disclosure of the Kiro API key via the Authorization header. The vulnerability is resolved in version 0.5.6.
Potential Impact
An authenticated attacker can cause 9router to send the Kiro API key validation request to a host under their control, leading to the disclosure of the API key. This compromises the confidentiality and integrity of the API key, potentially allowing unauthorized access to services relying on that key. There is no direct availability impact reported.
Mitigation Recommendations
Upgrade decolua 9router to version 0.5.6 or later, where this vulnerability is fixed. Patch status is confirmed by the vendor stating the fix is included in version 0.5.6. No additional mitigations are indicated.
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: 6a57f59668715ace437838e1
Added to database: 07/15/2026, 21:03:18 UTC
Last enriched: 07/22/2026, 23:03:33 UTC
Last updated: 08/28/2026, 10:52:09 UTC
Views: 86
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