CVE-2026-81530
KMS master key exposure via unredacted credential serialization in driver settings string
CVSS Score
5.6
EPSS Score
0.0%
EPSS Percentile
0th
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 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.
| CWE | CWE-532 |
| Vendor | mongodb |
| Product | c# driver |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 27, 2026 |
| Last Updated | Aug 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
MongoDB / C# Driver
2.10.0 < 3.11.1