MongoDB C# Driver up to 3.12.x Client-Side Encryption missing encryption

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k2.05-

Summaryinfo

A vulnerability, which was classified as problematic, was found in MongoDB C# Driver up to 3.12.x. This affects an unknown function of the component Client-Side Encryption. Such manipulation leads to missing encryption. This vulnerability is listed as CVE-2026-114650. The attack must be carried out locally. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in MongoDB C# Driver up to 3.12.x. Affected by this issue is some unknown functionality of the component Client-Side Encryption. The manipulation with an unknown input leads to a missing encryption vulnerability. Using CWE to declare the problem leads to CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at jira.mongodb.org. This vulnerability is handled as CVE-2026-114650 since 10/21/2026. The exploitation is known to be difficult. Local access is required to approach this attack. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

Upgrading to version 3.13.0 eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-108319) and CERT Bund (WID-SEC-2026-4126). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source MongoDB

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.1

VulDB Base Score: 2.5
VulDB Temp Score: 2.4
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.9
CNA Vector (mongodb): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing encryption
CWE: CWE-311 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: C# Driver 3.13.0

Timelineinfo

10/21/2026 CVE reserved
10/22/2026 +1 days Advisory disclosed
10/22/2026 +0 days VulDB entry created
10/23/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: jira.mongodb.org
Status: Confirmed

CVE: CVE-2026-114650 (🔒)
GCVE (CVE): GCVE-0-2026-114650
GCVE (VulDB): GCVE-100-425378
EUVD: 🔒
CERT Bund: WID-SEC-2026-4126 - MongoDB C# Treiber: Mehrere Schwachstellen

Entryinfo

Created: 10/22/2026 21:34
Updated: 10/23/2026 14:53
Changes: 10/22/2026 21:34 (76), 10/23/2026 00:21 (1), 10/23/2026 14:53 (7)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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