CVE-2026-18704
Medium
Description
An issue in MongoDB Server's aggregation framework could allow an authenticated user with only read privileges to perform write operations against collections they should not be able to modify. This is due to an internal-use aggregation stage being reachable by external clients without an appropriate authorization check on its embedded operations.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mongodb
PublishedAug 11, 2026
First seenAug 11, 2026
Weakness typeCWE-862Missing authorization
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 | 8.3.8 |
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