CVE-2026-114647
NoSQL operator injection via unvalidated replacement document in findOneAndReplace
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
The MongoDB C# Driver does not reject replacement documents whose top-level field names begin with a dollar sign in FindOneAndReplace, unlike other replace operations. An application that builds such a document from user-supplied field names can have the server apply update operators instead of a full replacement. The effect is limited to the document matched by the application's own filter, whose contents can be modified in ways the application did not intend.
| CWE | CWE-943 |
| Vendor | mongodb |
| Product | c# driver |
| Ecosystems | |
| Industries | Technology |
| Published | Oct 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None
Affected Versions
MongoDB / C# Driver
2.13.0 < 3.13.0