Vulnerability Details CVE-2026-9742
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 28.8%
CVSS Severity
CVSS v3 Score 7.5
Products affected by CVE-2026-9742
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cpe:2.3:a:mongodb:mongodb:8.2.0
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cpe:2.3:a:mongodb:mongodb:8.2.1
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cpe:2.3:a:mongodb:mongodb:8.2.2
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cpe:2.3:a:mongodb:mongodb:8.2.3
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cpe:2.3:a:mongodb:mongodb:8.2.4
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cpe:2.3:a:mongodb:mongodb:8.2.5
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cpe:2.3:a:mongodb:mongodb:8.2.6
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cpe:2.3:a:mongodb:mongodb:8.2.7
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cpe:2.3:a:mongodb:mongodb:8.3.0