Name: CVE-2026-9742: Improper Validation of Specified Type of Input
Creator: Rapid7
Published: 2026-06-09T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-9742, CWE-1287, CVSS 5.9, EPSS 0.00506

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 Details

CVSS 4.0 Base Score: 8.2 (HIGH)
CVSS 4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X)
CVSS 3.1 Base Score: 5.9
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Mongodb	—	Upgrade MongoDB to version 8.2.10Upgrade to the latest version of MongoDBUpgrade MongoDB to version 8.3.3	Jun 30, 2026	Jun 9, 2026

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CVSS Details

Covered by Rapid7

Prioritise with Active Threat Intelligence