CVE-2026-18698
Improper Authorization in MongoDB Server Allows Unauthorized Actions on System Collections via the validate Command
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that should require more specific privileges. This could result in exposure of collection metadata and, on certain deployment configurations, unauthorized modification of system collection data.
| CWE | CWE-863 |
| Vendor | mongodb |
| Product | mongodb server |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
MongoDB / MongoDB Server
8.3.0 < 8.3.8 8.0 < 8.0.29 7.0 < 7.0.40