What is CVE-2026-18692?

CVE-2026-18692 is a high-severity vulnerability in Mongodb Server, classified under Use After Free. CVSS score: 8.8/10. Published 2026-08-11.

How severe is CVE-2026-18692?

High severity. CVSS v3 base score is 8.8 out of 10.

Use After Free in Mongodb Server

CVE-2026-18692

An issue in MongoDB Server's handling of timeseries bucket lifecycle could allow an authenticated user with write privileges to cause an internal reference to be used after the underlying memory has been freed. Subsequent operations could…

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/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-2026-18692?: CVE-2026-18692 is a high-severity vulnerability in Mongodb Server, classified under Use After Free. CVSS score: 8.8/10. Published 2026-08-11.
How severe is CVE-2026-18692?: High severity. CVSS v3 base score is 8.8 out of 10.