RCE in MongoDB
CVE-2026-18708
An issue in MongoDB Server's JavaScript scripting engine could allow an authenticated user with write privileges to cause code they control to be executed within the query scope of other users, through a specially crafted stored value processed during an internal maintenance cycle. This could result in corruption of query results affecting other users and denial of service targeted at their operations on the same database. Impact is limited to the scripting engine's execution sandbox, which does not provide access to database, filesystem, or network resources.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (29.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% 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-130167 (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-18708?
- CVE-2026-18708 is a medium-severity vulnerability in MongoDB, classified under Code Injection. CVSS score: 6.4/10. Published 2026-08-11.
- How severe is CVE-2026-18708?
- Medium severity. CVSS v3 base score is 6.4 out of 10.