Vulnerability Description
A data-validation flaw exists in the BSON handling and binary serialization path of the MongoDB C# Driver. When an application constructs a raw or lazy BSON document object from externally supplied binary data, the driver does not verify that the size quantity declared inside that data matches the amount of data actually provided, and it copies the data onto the wire unchanged. An unauthenticated party who can supply binary content to such an application can thereby cause additional elements to be inserted into, or existing elements to be removed from, the database command the application issues, without needing any database credentials of their own. This can result in unauthorized modification of stored data and disclosure of data outside the intended scope of the application's request, bounded by the database privileges the application itself holds.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0
- https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-5chr-phc
- https://jira.mongodb.org/browse/CSHARP-6157
FAQ
What is CVE-2026-114646?
CVE-2026-114646 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A data-validation flaw exists in the BSON handling and binary serialization path of the MongoDB C# Driver. When an application constructs a raw or lazy BSON document object from externally supplied bi...
How severe is CVE-2026-114646?
CVE-2026-114646 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-114646?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.