What is CVE-2026-114643?

CVE-2026-114643 is a medium-severity vulnerability in MongoDB C# Driver, classified under Use of Multiple Resources with Duplicate Identifier. CVSS score: 5.4/10. Published 2026-10-22.

How severe is CVE-2026-114643?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Vulnerability in MongoDB C# Driver

CVE-2026-114643

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.

Published 2026-10-22.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

MongoDB C# Driver

Weakness classification (CWE)

CWE-694 — Use of Multiple Resources with Duplicate Identifier

References

Frequently asked questions

What is CVE-2026-114643?: CVE-2026-114643 is a medium-severity vulnerability in MongoDB C# Driver, classified under Use of Multiple Resources with Duplicate Identifier. CVSS score: 5.4/10. Published 2026-10-22.
How severe is CVE-2026-114643?: Medium severity. CVSS v3 base score is 5.4 out of 10.