What is CVE-2026-18711?

CVE-2026-18711 is a high-severity vulnerability in Mongodb Server, classified under Use After Free. CVSS score: 7.1/10. Published 2026-08-11.

How severe is CVE-2026-18711?

High severity. CVSS v3 base score is 7.1 out of 10.

Use After Free in Mongodb Server

CVE-2026-18711

An issue in MongoDB Server's query execution engine could allow an authenticated user with read and write privileges to cause an internal reference to be used after the underlying memory has been freed, when running certain queries against…

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H.

Affected products

Mongodb Server — versions 8.3.0, 8.0

Weakness classification (CWE)

CWE-416 — Use After Free

References

cna@mongodb.com

Frequently asked questions

What is CVE-2026-18711?: CVE-2026-18711 is a high-severity vulnerability in Mongodb Server, classified under Use After Free. CVSS score: 7.1/10. Published 2026-08-11.
How severe is CVE-2026-18711?: High severity. CVSS v3 base score is 7.1 out of 10.