CVE-2026-40009 in IoTDB
Summary
by MITRE • 07/10/2026
Improper Privilege Management, Improper Access Control vulnerability in Apache IoTDB. Authenticated users can escalate to full tree-path access by renaming themselves to __internal_auditor.
This issue affects Apache IoTDB: from 2.0.8 before 2.0.10.
Users are recommended to upgrade to version 2.0.10, which fixes the issue.
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Analysis
by VulDB Data Team • 07/10/2026
The vulnerability under discussion represents a critical improper privilege management flaw that exists within Apache IoTDB versions between 2.0.8 and 2.0.9 inclusive. This weakness manifests as an improper access control mechanism that allows authenticated users to escalate their privileges and gain full tree-path access to the system. The technical implementation contains a design flaw where the system fails to properly validate user permissions during critical operations, specifically when handling path renaming functions. This vulnerability directly maps to CWE-276, which classifies improper privilege management as a fundamental security weakness in software systems.
The operational impact of this vulnerability is severe and multifaceted. An authenticated attacker who exploits this flaw can effectively bypass normal access controls by simply renaming themselves to the special identifier __internal_auditor. This action grants them unrestricted access to the entire tree-path structure within the IoTDB system, potentially exposing sensitive time-series data, configuration information, and operational metrics. The attack vector is particularly concerning because it requires only authentication credentials, making it accessible to any user who has established a valid session with the system. This privilege escalation capability undermines the fundamental security model of the database, allowing attackers to read, modify, or delete any data within the system's hierarchical structure.
The root cause of this vulnerability stems from inadequate input validation and insufficient privilege checking mechanisms within the path management functions. When users attempt to rename paths, the system should verify that the operation is permitted based on the user's actual privileges rather than relying on simple identifier matching. The specific condition allowing access through __internal_auditor renaming suggests that the system contains a hardcoded or privileged identity check that does not properly validate whether the requesting user actually possesses the necessary authorization levels. This flaw aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation through legitimate administrative access controls.
Security mitigation for this vulnerability requires immediate upgrade to Apache IoTDB version 2.0.10, which implements proper access control checks and validates user privileges before allowing path operations. Organizations should also implement additional monitoring of path renaming activities and establish strict auditing procedures around privileged operations. The fix addresses the core issue by ensuring that system-level identifiers cannot be impersonated without proper authorization, thereby preventing unauthorized privilege escalation. System administrators should conduct thorough security assessments to identify any potential exploitation attempts and ensure that all users maintain appropriate least-privilege access rights to minimize the impact of such vulnerabilities.
This vulnerability demonstrates the critical importance of proper access control implementation in database systems, particularly those handling time-series data from IoT environments where sensitive operational information is commonly stored. The flaw represents a classic case of insufficient authorization checks during critical system operations and highlights the necessity for comprehensive security testing including privilege escalation scenarios. Organizations utilizing Apache IoTDB should also consider implementing network segmentation and additional security controls to limit the blast radius of potential exploitation, as this vulnerability could enable attackers to access large volumes of operational data across multiple system components.