CVE-2026-114643
Duplicate geometry fields via unvalidated GeoJSON extra members
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| C# Driver MongoDB |
≥ 1.8.0; < 3.13.0 (affected, semver)
Other versions: unaffected |
CNA: mongodb |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 5.3 medium |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N | CNA: mongodb |
| 3.1 / 5.4 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L | CNA: mongodb |
Exploit evidence
- https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-mqvm-xxqr-vqw5
exploit · ADP: CISA-ADP
References
- https://jira.mongodb.org/browse/CSHARP-6179CNA: mongodb
- https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0CNA: mongodb
- https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-mqvm-xxqr-vqw5CNA: mongodb
- https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-mqvm-xxqr-vqw5ADP: CISA-ADP · exploit
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