CVE-2026-114650 (GCVE-0-2026-114650)

Vulnerability from cvelistv5 – Published: 2026-10-22 19:13 – Updated: 2026-10-22 21:38
VLAI
Title
Plaintext exposure of encrypted fields via ANSI code-page corruption of database name
Summary
A flaw in the client-side encryption support of the MongoDB .NET/C# driver can cause data designated for client-side field-level encryption to be written without encryption. Under certain platform text-encoding configurations, an internal name conversion loses information, so the encryption layer fails to associate the operation with its configured encryption rules and the operation proceeds without an error being raised. An application user with the ability to write data through an affected application can therefore have sensitive fields persisted in plaintext, defeating the confidentiality guarantee that client-side encryption is intended to provide. No integrity or availability impact was observed.
Severity
6.9 (Medium)
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
5.9 (Medium)
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
CWE
  • CWE-838 - Inappropriate Encoding for Output Context
Assigner
mongodb CNA under the mitre root
CNA scorecard C 70/100 over 219 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
MongoDB C# Driver Affected: 2.10.0 , < 3.13.0 (semver)
guessed Create a notification for this product.
MongoDB MongoDB.Libmongocrypt NuGet package Affected: 1.0.0 , ≤ 1.12.0 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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}



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