Buffer overflow in Mongodb Server
CVE-2026-18693
An issue in MongoDB Server's handling of timeseries collections could allow an authenticated user with write privileges to cause an internal data structure to become inconsistent through certain document insertions. A subsequent insert int…
Vulnerability class: Buffer Overflow
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:H.
Affected products
- Mongodb Server — versions 8.3.0, 8.0, 7.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-18693?
- CVE-2026-18693 is a high-severity vulnerability in Mongodb Server, classified under Out-of-bounds Write. CVSS score: 7.6/10. Published 2026-08-11.
- How severe is CVE-2026-18693?
- High severity. CVSS v3 base score is 7.6 out of 10.