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HIGH

Deserializing compromised object with MongoDB .NET/C# Driver may cause remote code execution

Published Feb 21, 2023

Description

Under very specific circumstances (see Required configuration section below), a privileged user is able to cause arbitrary code to be executed which may cause further disruption to services. This is specific to applications written in C#. This affects all MongoDB .NET/C# Driver versions prior to and including v2.18.0

Following configuration must be true for the vulnerability to be applicable: * Application must written in C# taking arbitrary data from users and serializing data using _t without any validation AND * Application must be running on a Windows host using the full .NET Framework, not .NET Core AND * Application must have domain model class with a property/field explicitly of type System.Object or a collection of type System.Object (against MongoDB best practice) AND * Malicious attacker must have unrestricted insert access to target database to add a _t discriminator."Following configuration must be true for the vulnerability to be applicable

Affected products

Remediation

No remediation recorded yet.

References (6)

Change history (0)

No recorded changes yet.

Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mongodb
Published Feb 21, 2023
Updated Mar 11, 2025
Reserved Jan 23, 2023
CISA Vulnrichment
Updated Mar 11, 2025
NVD
Status Modified
Modified Jun 17, 2026
Red Hat
Severity n/a
Public date n/a
GHSA-7J9M-J397-G4WX