CVE-2026-18710 in Driver
Summary
by MITRE • 08/12/2026
A MongoDB driver component could write sensitive configuration information, including a credential used for outbound network connectivity, to application log output in cleartext during routine client initialization. This occurs automatically as part of normal operation and requires no special privileges to trigger. A party able to read the affected application's logs or downstream log-aggregation storage could recover the credential and reuse it to authenticate to the associated network infrastructure. This issue affects confidentiality only.
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Analysis
by VulDB Data Team • 08/12/2026
This vulnerability represents a critical configuration flaw in MongoDB driver components that exposes sensitive authentication credentials through improper logging practices. The technical implementation error occurs during routine client initialization when the driver automatically writes credential information to application log files in plaintext format without any sanitization or filtering mechanisms. This behavior violates fundamental security principles and creates an automatic credential exposure mechanism that operates without requiring any special privileges or malicious intent from an attacker. The flaw manifests as a direct write operation to log output streams where authentication tokens, connection strings, or other sensitive configuration parameters are serialized and stored in the application's logging infrastructure.
The operational impact of this vulnerability extends beyond simple information disclosure, as it creates persistent exposure windows that can be exploited by any entity with access to the application's log files or centralized log aggregation systems. This includes not only system administrators who may have legitimate access but also potential attackers who gain unauthorized access to logging infrastructure, backup systems, or cloud storage repositories where logs are archived. The automatic nature of this behavior means that every application instance using the affected MongoDB driver component will continuously expose credentials without requiring any specific attack vectors or user interaction. This vulnerability directly maps to CWE-532, which addresses "Information Exposure Through Log Files," and aligns with ATT&CK technique T1567.002 for "Exfiltration Over Web Service" when combined with log file access.
The confidentiality impact is severe as recovered credentials can be immediately reused against network infrastructure, potentially enabling unauthorized access to databases, network services, or other systems that rely on the same authentication mechanisms. This credential reuse capability transforms the initial information disclosure into a full compromise scenario where attackers can establish persistent access to target environments. The vulnerability affects all applications running the affected MongoDB driver versions regardless of their security posture or network segmentation measures, making it particularly dangerous in multi-tenant or complex infrastructure environments where log files may be shared across multiple applications or services. Organizations must implement immediate remediation strategies including driver version updates, log sanitization processes, and comprehensive credential rotation procedures to address this exposure.
Mitigation strategies should focus on immediate driver component updates that address the logging behavior, implementation of log filtering mechanisms that prevent credential output to standard logging streams, and comprehensive monitoring for any unauthorized access to application log files. Security teams must also establish automated credential rotation schedules and implement proper access controls around log aggregation systems to minimize the window of exposure. The vulnerability demonstrates the importance of secure coding practices in database connectivity components and highlights how seemingly routine operations can create significant security risks when proper input sanitization and output filtering are not implemented. Organizations should conduct thorough audits of their logging infrastructure to identify any other applications or components that may expose similar credential information through improper logging mechanisms.