CVE-2026-114647
Medium · 4.3CVSS
4.3
EPSS
0.3%
Published
Oct 22, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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