Vulnerability in MongoDB
CVE-2026-8199
An authenticated user can cause excess memory usage via bitwise match expression AST processing of $bitsAllSet, $bitsAnySet, $bitsAllClear, and $bitsAnyClear. This contributes to memory pressure and may lead to availability loss by OOM. This issue impacts MongoDB Server v7.0 versions prior to 7.0.34, v8.0 versions prior to 8.0.23, v8.2 versions prior to 8.2.9 and v8.3 versions prior to 8.3.2.
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: 0.005 (37.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.8% 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: 0.005 · change: +0.002
Affected products
- MongoDB
- MongoDB, Inc. MongoDB Server — versions 7.0, 8.0, 8.2
Weakness classification (CWE)
References
- jira.mongodb.org/browse/SERVER-122449 (issue-tracking, Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-8199?
- CVE-2026-8199 is a medium-severity vulnerability in MongoDB, classified under CWE-1325. CVSS score: 6.5/10. Published 2026-05-13.
- How severe is CVE-2026-8199?
- Medium severity. CVSS v3 base score is 6.5 out of 10.