What is CVE-2026-9735?

CVE-2026-9735 is a medium-severity vulnerability in Mongodb, classified under Insertion of Sensitive Information into Log File. CVSS score: 5.5/10. Published 2026-06-09.

How severe is CVE-2026-9735?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Information disclosure in Mongodb

CVE-2026-9735

MongoDB server 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 reda…

EPSS: 0.001 (2.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Mongodb
Mongodb Server — versions 8.3.0

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

cna@mongodb.com (Vendor Advisory)

Frequently asked questions

What is CVE-2026-9735?: CVE-2026-9735 is a medium-severity vulnerability in Mongodb, classified under Insertion of Sensitive Information into Log File. CVSS score: 5.5/10. Published 2026-06-09.
How severe is CVE-2026-9735?: Medium severity. CVSS v3 base score is 5.5 out of 10.