{"id":"CVE-2026-81530","title":"A weakness in the client-side encryption configuration surface of the MongoDB C# Driver causes sensitive key-management credential material supplied by the application to be reproduced verbatim in the driver's human-readable diagnostic r…","summary":"A weakness in the client-side encryption configuration surface of the MongoDB C# Driver causes sensitive key-management credential material supplied by the application to be reproduced verbatim in the driver's human-readable diagnostic r…","severity":"medium","cvss":5.6,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N","cwe":["CWE-532"],"vendor":"mongodb","product":"c#_driver","affected":["c#_driver >= 2.10.0, < 3.11.1"],"patched":["c#_driver 3.11.1"],"published":"2026-08-27","updated":"2026-09-29","sourceUpdated":"2026-09-29T19:16:13.963","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-81530","references":[{"url":"https://jira.mongodb.org/browse/CSHARP-6164","label":"cna@mongodb.com"},{"url":"https://www.nuget.org/packages/MongoDB.Driver/3.11.1","label":"cna@mongodb.com"}],"tags":["nvd"],"epss":0.00091,"epssPercentile":0.00456,"ingestedAt":"2026-09-29T19:44:04.118Z","slug":"CVE-2026-81530","body":"## Overview\n\nA weakness in the client-side encryption configuration surface of the MongoDB C# Driver causes sensitive key-management credential material supplied by the application to be reproduced verbatim in the driver's human-readable diagnostic representation of its client settings, instead of being masked as other secret fields are. A party able to read the application's logs, diagnostic output, or a process memory dump may thereby recover the plaintext credentials and use them to decrypt protected field data.\n\n## Affected\n\n- `c#_driver >= 2.10.0, < 3.11.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `c#_driver 3.11.1`","depth":"sunlit","depthScore":31,"depthScoreParts":{"impact":30.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}