CVE-2026-18703: CWE-863: Incorrect Authorization in MongoDB MongoDB Server
An issue in MongoDB Server could allow a party with a valid client certificate and a corresponding user account to authenticate using a certificate-based authentication method, even when an administrator has configured the server to restrict authentication to other mechanisms. This could allow authentication through a method the administrator intended to disable.
AI Analysis
Technical Summary
This vulnerability (CWE-863) in MongoDB Server 8.3.0 allows a party possessing a valid client certificate and corresponding user account to authenticate using certificate-based authentication despite administrator configurations that restrict authentication methods. Essentially, the server fails to enforce the administrator's restrictions on allowed authentication mechanisms, permitting authentication through a method that should be disabled.
Potential Impact
An attacker or user with a valid client certificate and user account can bypass authentication restrictions set by the administrator, potentially gaining access through an unintended authentication method. The CVSS score of 2.3 indicates low impact, reflecting limited exploitability and impact scope.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, administrators should be aware of this limitation and consider additional compensating controls if certificate-based authentication restrictions are critical.
CVE-2026-18703: CWE-863: Incorrect Authorization in MongoDB MongoDB Server
Description
An issue in MongoDB Server could allow a party with a valid client certificate and a corresponding user account to authenticate using a certificate-based authentication method, even when an administrator has configured the server to restrict authentication to other mechanisms. This could allow authentication through a method the administrator intended to disable.
CVSS v4.0
Score 2.3low
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-863) in MongoDB Server 8.3.0 allows a party possessing a valid client certificate and corresponding user account to authenticate using certificate-based authentication despite administrator configurations that restrict authentication methods. Essentially, the server fails to enforce the administrator's restrictions on allowed authentication mechanisms, permitting authentication through a method that should be disabled.
Potential Impact
An attacker or user with a valid client certificate and user account can bypass authentication restrictions set by the administrator, potentially gaining access through an unintended authentication method. The CVSS score of 2.3 indicates low impact, reflecting limited exploitability and impact scope.
Mitigation Recommendations
No official patch or remediation guidance is currently available. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is released, administrators should be aware of this limitation and consider additional compensating controls if certificate-based authentication restrictions are critical.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-08-03T15:53:42.110Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7b6d42bf8831d53933614e
Added to database: 08/11/2026, 18:43:14 UTC
Last enriched: 08/11/2026, 19:13:14 UTC
Last updated: 08/12/2026, 00:59:10 UTC
Views: 7
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