CVE-2026-9742 HIGH

CVE-2026-9742: Authenticate command with specific mechanism parameter can trigger server crash

Vendor Mongodb
Product MongoDB Server
Weakness CWE-1287
Published June 9, 2026
Last update June 10, 2026
View on NVD All CVEs

CVSS base score

8.2/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 9, 2026 CVE published
June 10, 2026 Record updated