Vulnerability in MongoDB
CVE-2026-18707
An issue in MongoDB Server could allow an authenticated user, including one with no assigned privileges, to cause the server process to terminate unexpectedly by submitting a specially formed aggregation command. This could result in a denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.003 (15.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 15.4% 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: 0.003 · change: -0.000
Affected products
- MongoDB — versions 9.0.0, 9.1.0
- MongoDB Server — versions 8.3.0
Weakness classification (CWE)
References
- jira.mongodb.org/browse/SERVER-128482 (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18707?
- CVE-2026-18707 is a medium-severity vulnerability in MongoDB, classified under Reachable Assertion. CVSS score: 4.3/10. Published 2026-08-11.
- How severe is CVE-2026-18707?
- Medium severity. CVSS v3 base score is 4.3 out of 10.