Description

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.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-08-11T22:17:20.113Z",
  "pubdate": "2026-08-11T22:17:20.113Z",
  "executiveSummary": "A cleartext credential exposure vulnerability exists within the MongoDB driver component. During routine client initialization and as part of normal operations, the affected component automatically writes sensitive configuration information, including outbound network connectivity credentials, directly to application log outputs in plain text.\nThe primary impact of this vulnerability is a breach of confidentiality. Any malicious actor or unauthorized party with read access to the affected application's local log files or downstream log-aggregation storage systems can successfully recover the exposed credentials.\nThe affected systems include applications utilizing the vulnerable MongoDB driver component. Risk implications are significant, as compromised credentials can be reused by an attacker to authenticate directly to associated external network infrastructure.\nAttacker capabilities are limited to passive or active reading of log repositories; however, no special privileges are required to trigger or exploit the issue since the logging behavior occurs automatically during standard client execution. There are no complex exploitation requirements beyond access to the log outputs where the sensitive data is inadvertently persisted.",
  "technicalDetails": "The root cause of this vulnerability lies in insecure logging practices within the MongoDB driver component. During standard client initialization routines, the component improperly handles sensitive configuration parameters, inadvertently writing them to standard logging facilities without prior redaction, masking, or encryption.\nThe vulnerable component is the MongoDB driver initialization and configuration subsystem. The affected versions exhibit this behavior automatically during normal runtime operations whenever a client instance is instantiated with specific network connectivity configurations.\nRegarding authentication and privilege requirements, the generation of the vulnerability requires no special privileges, as it occurs intrinsically as part of standard application startup and operation. Similarly, exploitation of the resulting log data requires no administrative privileges on the application itself, only unauthorized read access to where the logs are stored or transmitted.\nThe network exposure of the vulnerability is localized to the log generation sink and any downstream log-aggregation platforms, SIEM systems, or centralized logging servers that ingest the application's standard output or log files.\nThe step-by-step attack flow proceeds as follows: First, an application utilizing the vulnerable MongoDB driver starts up or initializes a new database client. Second, the driver automatically outputs its configuration parameters, including outbound network credentials, in cleartext to the application logs. Third, an adversary with read access to local log files or centralized log-aggregation storage inspects the log entries. Fourth, the adversary extracts the plaintext credentials. Finally, the attacker reuses the harvested credentials to authenticate to the associated network infrastructure and compromise downstream systems.\nThe post-exploitation impact is strictly confined to confidentiality loss regarding the exposed credentials, which subsequently enables unauthorized authentication and potential lateral movement or data access against the connected network infrastructure."
}