Vulnerability in MongoDB
CVE-2026-18695
An issue in MongoDB Server's handling of certain query predicates against time-series collections with a metaField could allow an authenticated user with write access to cause the server process to terminate unexpectedly, resulting in a denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (31.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- MongoDB — versions 9.0.0, 9.1.0
- MongoDB Server — versions 8.3.0, 8.0, 7.0
Weakness classification (CWE)
References
- jira.mongodb.org/browse/SERVER-129460 (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18695?
- CVE-2026-18695 is a medium-severity vulnerability in MongoDB, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-08-11.
- How severe is CVE-2026-18695?
- Medium severity. CVSS v3 base score is 6.5 out of 10.