CVE-2026-56679: CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes in decolua 9router
CVE-2026-56679 is a high-severity vulnerability in decolua's 9router prior to version 0.5.4. The PATCH /api/settings endpoint improperly writes the entire request body to persistent settings without restricting which fields can be modified. This allows an authenticated user to change security-critical fields such as requireLogin, effectively disabling authentication and exposing protected API routes to unauthenticated access. The issue is fixed in version 0.5.4.
AI Analysis
Technical Summary
The vulnerability in decolua 9router versions before 0.5.4 involves improper control over modification of dynamically-determined object attributes. Specifically, the PATCH /api/settings endpoint accepts a request body that is written wholesale to persistent settings without a whitelist of allowed fields. This enables an authenticated user to alter critical security settings like requireLogin, disabling authentication for the entire application. Consequently, protected routes such as /api/keys and /api/providers become accessible without authentication. The vulnerability is tracked as CWE-915 and has a CVSS 4.0 base score of 8.7 (high severity). The issue is resolved in version 0.5.4.
Potential Impact
An authenticated user can disable authentication by modifying security-critical settings, leading to unauthorized access to protected API endpoints. This compromises the confidentiality and integrity of sensitive application data and functionality by exposing routes that should require authentication to unauthenticated users.
Mitigation Recommendations
Upgrade to version 0.5.4 or later, where this vulnerability is fixed by implementing proper field whitelisting on the PATCH /api/settings endpoint. No other mitigation is indicated or required as the fix is available in the official release.
CVE-2026-56679: CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes in decolua 9router
Description
CVE-2026-56679 is a high-severity vulnerability in decolua's 9router prior to version 0.5.4. The PATCH /api/settings endpoint improperly writes the entire request body to persistent settings without restricting which fields can be modified. This allows an authenticated user to change security-critical fields such as requireLogin, effectively disabling authentication and exposing protected API routes to unauthenticated access. The issue is fixed in version 0.5.4.
CVSS v4.0
Score 8.7high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in decolua 9router versions before 0.5.4 involves improper control over modification of dynamically-determined object attributes. Specifically, the PATCH /api/settings endpoint accepts a request body that is written wholesale to persistent settings without a whitelist of allowed fields. This enables an authenticated user to alter critical security settings like requireLogin, disabling authentication for the entire application. Consequently, protected routes such as /api/keys and /api/providers become accessible without authentication. The vulnerability is tracked as CWE-915 and has a CVSS 4.0 base score of 8.7 (high severity). The issue is resolved in version 0.5.4.
Potential Impact
An authenticated user can disable authentication by modifying security-critical settings, leading to unauthorized access to protected API endpoints. This compromises the confidentiality and integrity of sensitive application data and functionality by exposing routes that should require authentication to unauthenticated users.
Mitigation Recommendations
Upgrade to version 0.5.4 or later, where this vulnerability is fixed by implementing proper field whitelisting on the PATCH /api/settings endpoint. No other mitigation is indicated or required as the fix is available in the official release.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-22T16:39:01.044Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a57f59668715ace437838e6
Added to database: 07/15/2026, 21:03:18 UTC
Last enriched: 07/15/2026, 21:17:38 UTC
Last updated: 07/16/2026, 03:33:05 UTC
Views: 11
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