MongoDB Rust Driver Trace Disclosure Field Values Before Client-Side Encryption
CVE-2026-120673 Published on November 3, 2026
Rust Driver 3.9.1 exports CSFLE plaintext in `db.query.text` before encrypting the command
A component of the MongoDB Rust Driver that records diagnostic tracing data can capture command content before automatic client-side field level encryption is applied. In deployments that turn on the optional tracing capability together with automatic in-use encryption, a party with read access to the application's exported trace data may obtain field values that the application designated for encryption, without access to the encryption keys. This may result in unintended disclosure of data.
Vulnerability Analysis
CVE-2026-120673 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Insertion of Sensitive Information into Log File
Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.
Affected Versions
MongoDB Rust Driver:- Version 3.4.0 and below 3.9.1 is affected.