CVE-2026-114643
Medium
Description
The MongoDB C# Driver writes GeoJSON extra members without checking whether their names collide with reserved GeoJSON members such as type and coordinates. An application that places user-supplied field names into these extra members can store documents with duplicate geometry fields, so the server and the driver resolve different values for the same record. Affected records can also become unreadable through the driver, interrupting application code that reads them.
SeverityMedium
CVSS5.4
Exploit probability—
Product
C# Driver
PublishedOct 22, 2026
First seenOct 22, 2026
Weakness typeCWE-694CWE-694
How to fix
Update
- MongoDB C# Driver3.13.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| MongoDB C# Driver | 1.8.0 ≤ v < 3.13.0 | 3.13.0 |
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