Is there a public exploit for CVE-2026-114646?

No public exploit for CVE-2026-114646 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-114646?

CVE-2026-114646 scores CVSS 6.9 (v4.0), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.26%.

What does CVE-2026-114646 affect?

CVE-2026-114646 affects MONGODB C# Driver.

6.9 Medium

A data-validation flaw exists in the BSON handling and binary serialization path of the MongoDB C# Driver.

CVE-2026-114646

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.

Assessment

CVSS: 6.9 (v4.0)
Severity: Medium
EPSS: 0.26% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 22 October 2026
Last updated: 2 November 2026
Affected: MONGODB · C# Driver
Assigner: mongodb

CVSS vectorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

At the source

EUVD (ENISA)

References

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