{"affected":[{"defaultStatus":"unaffected","product":"C# Driver","source":"CNA: mongodb","vendor":"MongoDB","versions":[{"lessThan":"3.13.0","status":"affected","version":"2.13.0","versionType":"semver"}]}],"cveId":"CVE-2026-114647","cwes":["CWE-943"],"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.","epss":{"date":"2026-11-01","percentile":0.17594,"score":0.00259},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-68cj-624m-mxj3"}],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: mongodb","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},{"score":4.3,"severity":"medium","source":"CNA: mongodb","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","version":"3.1"}],"modifiedAt":1793621983566,"publishedAt":1792696431972,"references":[{"source":"CNA: mongodb","tags":[],"url":"https://jira.mongodb.org/browse/CSHARP-6186"},{"source":"CNA: mongodb","tags":[],"url":"https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0"},{"source":"CNA: mongodb","tags":[],"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-68cj-624m-mxj3"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-68cj-624m-mxj3"}],"remediation":[],"revision":"b051fbfda5290b44daee280be143ffd601cb96062650c062659a68496b456299","sources":[{"modifiedAt":1793621983566,"name":"CNA: mongodb","retrievedAt":1793624917609,"url":"https://www.cve.org/CVERecord?id=CVE-2026-114647"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793624957053,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-114647"}],"ssvc":{"assessedAt":1793621934406,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"NoSQL operator injection via unvalidated replacement document in findOneAndReplace","updatedAt":1793624957053}