Description

An issue in MongoDB Server could allow an authenticated user with limited, database-scoped privileges to modify diagnostic logging settings that affect the entire server rather than just the intended database. This could allow suppression of diagnostic logging server-wide, potentially obscuring unauthorized activity, or degrade operational monitoring by causing excessive log volume.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.4",
  "pubDate": "2026-08-11T19:17:24.743Z",
  "pubdate": "2026-08-11T19:17:24.743Z",
  "executiveSummary": "An improper authorization vulnerability has been identified in MongoDB Server that introduces significant security and operational risks to database deployments. The flaw allows an authenticated user, constrained by limited, database-scoped privileges, to modify diagnostic logging settings that impact the entire server infrastructure rather than being strictly confined to their authorized database context. This security boundary violation grants low-privileged actors unauthorized administrative influence over global server telemetry. The primary impact of this vulnerability manifests in two distinct operational extremes: the complete suppression of server-wide diagnostic logging, which can be leveraged by malicious actors to effectively obscure unauthorized activities and forensic footprints, or the artificial generation of excessive log volume, causing severe denial of service through operational monitoring degradation and resource exhaustion. Exploitation of this vulnerability requires prior authentication to the MongoDB Server and relies on the abuse of existing database-scoped permissions that improperly inherit or fail to enforce global administrative boundaries. Organizations utilizing vulnerable MongoDB Server instances face compromised audit integrity, reduced defensive visibility, and potential operational instability. Immediate remediation requires strict access control reviews to ensure users with database-scoped privileges cannot execute administrative configuration commands that alter global server states.",
  "technicalDetails": "The vulnerability resides within the configuration management subsystem of MongoDB Server, specifically concerning the handling of diagnostic logging settings. The root cause stems from insufficient privilege validation and improper authorization checks when evaluating commands intended to modify server behavior. Although the targeted functionality is expected to adhere to database-scoped privilege boundaries, the underlying implementation fails to restrict execution context, allowing commands originating from restricted sessions to propagate globally across the entire database instance.\nThe attack flow requires the adversary to possess valid credentials and authenticated access to the MongoDB Server with limited, database-scoped privileges. Rather than escalating privileges through memory corruption or traditional code execution, the attacker exploits logical authorization flaws within the command execution pipeline. Step-by-step, the exploitation occurs as follows: first, the authenticated user issues a configuration modification command targeting diagnostic logging parameters via the standard client-server protocol. Second, the vulnerable component processes the request within the limited database context but applies the modifications globally due to absent boundary enforcement. Finally, the server updates its operational parameters, resulting in either total log suppression or log flooding depending on the attacker's supplied payload.\nThe affected component is the database configuration and logging subsystem responsible for parsing and enforcing administrative command execution. The vulnerability affects MongoDB Server instances where database-scoped roles improperly permit global configuration changes. Network exposure depends on the deployment architecture, but successful exploitation requires network connectivity to the MongoDB port and valid authentication credentials. Post-exploitation impact includes the impairment of security monitoring systems, persistent obfuscation of malicious lateral movement or data exfiltration, and operational degradation caused by log-based resource exhaustion."
}