What is CVE-2026-9751?

CVE-2026-9751 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-2026-9751?

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

Information disclosure in MongoDB

CVE-2026-9751

The ldapQueryPassword parameter, when set through the runtime setParameter command, will log the new password to the mongod.log file in plain text.

Published 2026-06-09 · last modified 2026-07-23.

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.

EPSS exploit prediction

EPSS: 0.002 (4.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.000

Affected products

MongoDB
MongoDB Server — versions 8.3.0, 8.2.0, 8.0.0

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

jira.mongodb.org/browse/SERVER-123370 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-9751?: CVE-2026-9751 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-2026-9751?: Medium severity. CVSS v3 base score is 5.5 out of 10.