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CVE-2026-9742

Authenticate command with specific mechanism parameter can trigger server crash

Published: Jun 9, 2026Updated: Jun 9, 2026 Sources: CVE List NVD
NVD MITRE
7.5CVSS
HIGH

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.

EPSS Score
N/A
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High

Weaknesses

CWE-1287

Affected Products

MongoDB Server
MongoDB

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://jira.mongodb.org/browse/SERVER-124183
jira.mongodb.org

Timeline

Published
Jun 9, 2026
Last Updated
Jun 9, 2026

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