PatchSiren cyber security CVE debrief

CVE-2026-9735 MongoDB CVE debrief

CVE-2026-9735 is a medium severity vulnerability (CVSS Score: 6.8) that affects MongoDB server. The vulnerability may log authentication parameters, including credentials, to the server log during SASL authentication when connection health metric logging is enabled. The full authentication parameters are written to the log without redaction.

Vendor: MongoDB
Product: MongoDB Server
CVSS: MEDIUM 6.8
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-09
Original CVE updated: 2026-06-10
Advisory published: 2026-06-09
Advisory updated: 2026-06-10

Who should care

Users of MongoDB server should be aware of this vulnerability, especially those who have connection health metric logging enabled.

Technical summary

The MongoDB server may log authentication parameters, including credentials, to the server log during SASL authentication. This occurs when connection health metric logging is enabled, and the full authentication parameters are written to the log without redaction.

Defensive priority

medium

Recommended defensive actions

Review and update MongoDB server logging configurations to ensure sensitive information is not logged.
Consider disabling connection health metric logging or implementing log redaction.

Evidence notes

Vendor and product information is based on limited evidence and may require further verification.

Official resources

CVE-2026-9735 was published on 2026-06-09T23:17:03.287Z and modified on 2026-06-10T19:43:28.857Z.