CVE-2026-18706
Medium
Description
An issue in MongoDB Server's $graphLookup aggregation stage could allow an authenticated user able to issue aggregation and memory-management commands to cause an internal reference to be used after the underlying memory has been freed. This could result in a server crash or, potentially, execution of unintended code.
SeverityMedium
CVSS6.6
Exploit probability—
Product
Mongodb
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- mongodb mongodb8.3.8 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mongodb mongodb | 8.3.0 ≤ v < 8.3.8, 9.0.0 | 8.3.8 |
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