{"id":"CVE-2026-114647","aliases":["EUVD-2026-108312","GHSA-68cj-624m-mxj3"],"status":"published","title":"NoSQL operator injection via unvalidated replacement document in findOneAndReplace","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.","severity":{"version":"4.0","score":5.3,"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00306,"percentile":0.2376,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-943"],"published":"2026-10-22T19:13:51Z","modified":"2026-11-04T02:30:52Z","products":[{"vendor":"mongodb","product":"c# driver"}],"references":[{"url":"https://jira.mongodb.org/browse/CSHARP-6186","tags":["web"]},{"url":"https://github.com/mongodb/mongo-csharp-driver/releases/tag/v3.13.0","tags":["web"]},{"url":"https://github.com/mongodb/mongo-csharp-driver/security/advisories/GHSA-68cj-624m-mxj3","tags":["exploit","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/114xxx/CVE-2026-114647.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-114647","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-114647","title":"NoSQL operator injection via unvalidated replacement document in findOneAndReplace","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.","status":"published","published":"2026-10-22T19:13:51.972Z","modified":"2026-11-02T12:19:43.566Z","cvss":[{"version":"4.0","score":5.3,"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","level":"medium","assessor":"cna"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-943"],"updated_at":"2026-11-02T18:00:08.034842Z"}],"euvd":[{"id":"EUVD-2026-108312","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.","status":"published","published":"2026-10-22T19:13:51Z","modified":"2026-11-02T12:19:43Z","cvss":[{"version":"4.0","score":5.3,"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","level":"medium"}],"updated_at":"2026-11-02T16:58:45.728338Z"}],"nvd":[{"id":"CVE-2026-114647","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.","status":"published","published":"2026-10-22T19:17:38.437Z","modified":"2026-11-02T13:17:35.803Z","cvss":[{"version":"4.0","score":5.3,"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-943"],"updated_at":"2026-11-02T20:51:42.332165Z"}],"osv":[{"id":"CVE-2026-114647","title":"NoSQL operator injection via unvalidated replacement document in findOneAndReplace","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.","status":"published","published":"2026-10-22T19:13:51.972Z","modified":"2026-11-04T02:30:52.347052103Z","cvss":[{"version":"4.0","score":5.3,"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","level":"medium"}],"cwes":["CWE-943"],"updated_at":"2026-11-04T02:54:44.889498Z"}]}}