CVE-2026-9742: CWE-1287 Improper validation of specified type of input in MongoDB MongoDB Server
When OIDC authentication is enabled in configuration, clients may set specific values in the "mechanism" parameter of the "authenticate" command that lead to server crash. The authenticate command is accessible to unauthenticated clients, leading to pre-auth denial-of-service in affected product configurations.
AI Analysis
Technical Summary
This vulnerability involves improper validation of the 'mechanism' parameter in the 'authenticate' command when OIDC authentication is enabled in MongoDB Server. Because the 'authenticate' command is accessible to unauthenticated clients, attackers can trigger a server crash by specifying certain values in the 'mechanism' parameter, leading to denial-of-service. The issue is tracked as CWE-1287 and affects MongoDB Server versions 8.2.0 and 8.3.0. No official remediation or patch has been disclosed as of the publication date.
Potential Impact
An attacker can cause a denial-of-service condition by crashing the MongoDB server without requiring authentication. This disrupts availability of the database service in affected configurations where OIDC authentication is enabled.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider disabling OIDC authentication if feasible or restricting network access to the 'authenticate' command to trusted clients only to reduce exposure.
CVE-2026-9742: CWE-1287 Improper validation of specified type of input in MongoDB MongoDB Server
Description
When OIDC authentication is enabled in configuration, clients may set specific values in the "mechanism" parameter of the "authenticate" command that lead to server crash. The authenticate command is accessible to unauthenticated clients, leading to pre-auth denial-of-service in affected product configurations.
CVSS v4.0
Score 8.2high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper validation of the 'mechanism' parameter in the 'authenticate' command when OIDC authentication is enabled in MongoDB Server. Because the 'authenticate' command is accessible to unauthenticated clients, attackers can trigger a server crash by specifying certain values in the 'mechanism' parameter, leading to denial-of-service. The issue is tracked as CWE-1287 and affects MongoDB Server versions 8.2.0 and 8.3.0. No official remediation or patch has been disclosed as of the publication date.
Potential Impact
An attacker can cause a denial-of-service condition by crashing the MongoDB server without requiring authentication. This disrupts availability of the database service in affected configurations where OIDC authentication is enabled.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider disabling OIDC authentication if feasible or restricting network access to the 'authenticate' command to trusted clients only to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mongodb
- Date Reserved
- 2026-05-27T17:34:08.786Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a2892f48dd33fbd858e3b38
Added to database: 06/09/2026, 22:25:56 UTC
Last enriched: 06/15/2026, 08:06:10 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 75
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