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 vulnerability occurs in the Kiro API-key validation endpoint, which constructs an upstream URL using a user-controlled region parameter. An authenticated attacker can supply a crafted region value to redirect the validation request to an attacker-controlled host, causing the Kiro API key to be forwarded as an Authorization header. This issue is fixed in version 0.5.6.
AI Analysis
Technical Summary
The vulnerability in decolua 9router (prior to version 0.5.6) involves improper input validation (CWE-20) in the Kiro API-key validation endpoint POST /api/oauth/kiro/api-key. The endpoint builds an upstream URL using a user-controlled 'region' parameter without proper sanitization, allowing an authenticated attacker to supply a crafted region such as 'kiro-canary.local:8443#'. This causes 9router to send the Kiro validation request to an attacker-controlled host, forwarding the submitted Kiro API key as an Authorization header. The vulnerability is fixed in version 0.5.6.
Potential Impact
An authenticated attacker can redirect the Kiro API-key validation request to a host under their control, causing the API key to be leaked in the Authorization header. This can lead to unauthorized use of the API key, potentially compromising the security of the affected system or associated services. The CVSS 3.1 base score is 6.4 (medium severity), reflecting network attack vector, low attack complexity, required privileges, no user interaction, and partial confidentiality and integrity impact.
Mitigation Recommendations
Upgrade to decolua 9router version 0.5.6 or later, where the vulnerability has been fixed. Patch status is confirmed by the vendor stating the issue is resolved in version 0.5.6. No other mitigation is 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 vulnerability occurs in the Kiro API-key validation endpoint, which constructs an upstream URL using a user-controlled region parameter. An authenticated attacker can supply a crafted region value to redirect the validation request to an attacker-controlled host, causing the Kiro API key to be forwarded as an Authorization header. This issue 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 (prior to version 0.5.6) involves improper input validation (CWE-20) in the Kiro API-key validation endpoint POST /api/oauth/kiro/api-key. The endpoint builds an upstream URL using a user-controlled 'region' parameter without proper sanitization, allowing an authenticated attacker to supply a crafted region such as 'kiro-canary.local:8443#'. This causes 9router to send the Kiro validation request to an attacker-controlled host, forwarding the submitted Kiro API key as an Authorization header. The vulnerability is fixed in version 0.5.6.
Potential Impact
An authenticated attacker can redirect the Kiro API-key validation request to a host under their control, causing the API key to be leaked in the Authorization header. This can lead to unauthorized use of the API key, potentially compromising the security of the affected system or associated services. The CVSS 3.1 base score is 6.4 (medium severity), reflecting network attack vector, low attack complexity, required privileges, no user interaction, and partial confidentiality and integrity impact.
Mitigation Recommendations
Upgrade to decolua 9router version 0.5.6 or later, where the vulnerability has been fixed. Patch status is confirmed by the vendor stating the issue is resolved in version 0.5.6. No other mitigation is 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: 07/15/2026, 21:18:07 UTC
Last updated: 07/16/2026, 00:42:41 UTC
Views: 7
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