{"id":"CVE-2026-114647","published":"2026-10-22T19:17:38.437","lastModified":"2026-10-23T19:45:03.547","description":"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.","cvssScore":4.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","cwes":["CWE-943"],"vendors":[],"products":[],"references":[{"url":"https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0","tags":[]},{"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-68cj-624m-mxj3","tags":[]},{"url":"https://jira.mongodb.org/browse/CSHARP-6186","tags":[]}],"exploitRefs":[{"url":"https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0","tags":[]},{"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-68cj-624m-mxj3","tags":[]}],"hasPoc":true,"ai":null}