Auth bypass in MongoDB
CVE-2026-82062
A security issue in MongoDB Server allows an authenticated user with elevated internal privileges to bypass a disabled feature gate in the applyOps command by specifying an internal replication mode value that was not intended to be client-selectable. This bypass enables execution of container operations that are disabled by default in production configurations, allowing direct storage-engine writes to arbitrary internal storage tables. The authorization check for these operations validates only the operation's namespace, not the actual storage target, enabling writes to unrelated internal metadata or other collections' data.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L.
EPSS exploit prediction
EPSS: 0.005 (38.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
Weakness classification (CWE)
References
- jira.mongodb.org/browse/SERVER-131138 (Issue Tracking, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-82062?
- CVE-2026-82062 is a medium-severity vulnerability in MongoDB, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2026-09-08.
- How severe is CVE-2026-82062?
- Medium severity. CVSS v3 base score is 5.5 out of 10.