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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
2026-06-15
Advisory published
2026-06-09
Advisory updated
2026-06-15

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-9735 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-9735

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-9735 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-9735

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.