CVE-2026-62350 in TDengine
Summary
by MITRE • 07/15/2026
TDengine is an open source, time-series database optimized for Internet of Things devices. Prior to 3.4.1.15, a user with create udf privilege could upload a crafted shared library and install it as a user-defined function, such as eval, then execute arbitrary C code on the TDengine server side through database queries. This issue is fixed in version 3.4.1.15.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 07/15/2026
This vulnerability represents a critical remote code execution flaw in TDengine database systems that allows authenticated users with specific privileges to escalate their access and compromise the underlying server infrastructure. The vulnerability stems from insufficient validation mechanisms during user-defined function installation processes, creating a path for privilege escalation attacks that can ultimately lead to complete system compromise. Attackers exploiting this issue can leverage the create udf privilege to upload malicious shared libraries and register them as functions like eval, effectively bypassing normal security boundaries within the database environment.
The technical implementation of this vulnerability involves the improper handling of shared library uploads within TDengine's user-defined function framework. When users with create udf permissions upload crafted shared libraries, the system fails to adequately validate the contents or origin of these libraries before installation. This validation gap enables attackers to construct malicious code that executes with the privileges of the database service account on the server. The vulnerability specifically affects versions prior to 3.4.1.15 where proper input sanitization and security checks were not implemented during the function registration process.
From an operational perspective, this vulnerability poses severe risks to IoT deployments that rely on TDengine for time-series data management. Organizations using TDengine in industrial control systems, smart city infrastructure, or connected device networks face potential disruption of critical operations if attackers exploit this flaw. The impact extends beyond simple data compromise as the ability to execute arbitrary C code provides attackers with complete control over the database server, potentially enabling them to access other system resources, escalate privileges further, or establish persistent backdoors within the network infrastructure.
This vulnerability aligns with CWE-434 which identifies insecure upload of executable code as a fundamental security weakness. The issue also maps to ATT&CK technique T1059.007 for command and scripting interpreter via shared libraries, demonstrating how legitimate system components can be abused for malicious purposes. The attack vector specifically follows T1203 for exploitation of remote services through privilege escalation mechanisms, where the initial authentication step provides sufficient access to leverage the underlying code execution vulnerability.
Organizations should immediately upgrade to TDengine version 3.4.1.15 or later to address this security gap. Additionally, implementing network segmentation and privilege separation measures can help limit potential damage from exploitation attempts. System administrators should review existing user permissions and ensure that create udf privileges are strictly limited to trusted personnel only. Regular monitoring of database system logs for unusual library loading activities and unauthorized function installations should be implemented as part of comprehensive security operations. The fix in version 3.4.1.15 includes enhanced validation mechanisms that properly verify the integrity and content of shared libraries before installation, preventing malicious code from being registered as user-defined functions within the database environment.