What is CVE-2026-9742?

CVE-2026-9742 is a high-severity vulnerability in Mongodb, classified under CWE-1287. CVSS score: 7.5/10. Published 2026-06-09.

How severe is CVE-2026-9742?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Mongodb

CVE-2026-9742

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…

EPSS: 0.003 (27.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Mongodb
Mongodb Server — versions 8.3.0, 8.2.0

Weakness classification (CWE)

CWE-1287

References

cna@mongodb.com (Patch, Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2026-9742?: CVE-2026-9742 is a high-severity vulnerability in Mongodb, classified under CWE-1287. CVSS score: 7.5/10. Published 2026-06-09.
How severe is CVE-2026-9742?: High severity. CVSS v3 base score is 7.5 out of 10.