What is CVE-2026-18706?

CVE-2026-18706 is a medium-severity vulnerability in Mongodb Server, classified under Use After Free. CVSS score: 6.6/10. Published 2026-08-11.

How severe is CVE-2026-18706?

Medium severity. CVSS v3 base score is 6.6 out of 10.

Use After Free in Mongodb Server

CVE-2026-18706

An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. Th…

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 6.6 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H.

Affected products

Mongodb Server — versions 8.3.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

cna@mongodb.com

Frequently asked questions

What is CVE-2026-18706?: CVE-2026-18706 is a medium-severity vulnerability in Mongodb Server, classified under Use After Free. CVSS score: 6.6/10. Published 2026-08-11.
How severe is CVE-2026-18706?: Medium severity. CVSS v3 base score is 6.6 out of 10.