CVE-2026-108821 in WeKnora
Summary
by MITRE • 10/12/2026
A security vulnerability has been detected in Tencent WeKnora up to 0.8.1. Impacted is the function validateSubquery of the file internal/utils/inject.go of the component SQL Validator. The manipulation leads to sql injection. The attack is possible to be carried out remotely. The exploit has been disclosed publicly and may be used. Upgrading to version 0.8.2 is recommended to address this issue. The identifier of the patch is d7ccd5ba517cc3968e6d5000a2ab0f4b51ef1dda. It is recommended to upgrade the affected component.
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Analysis
by VulDB Data Team • 10/12/2026
A critical security vulnerability has been identified within Tencent WeKnora, specifically affecting versions up through 0.8.1. This flaw resides in the SQL Validator component, which serves as a crucial defense layer for query processing and sanitization before execution against underlying databases. The specific point of failure is located in the validateSubquery function found within the internal/utils/inject.go file. As an integral part of the application's input validation logic, this module is responsible for inspecting subqueries to ensure they adhere to safe syntax patterns and do not contain malicious payloads. However, due to insufficient sanitization or logical errors in how these subqueries are processed, attackers can bypass intended restrictions, leading directly to a SQL injection vulnerability.
The technical nature of this flaw allows an attacker to inject arbitrary Structured Query Language commands into the application's database layer. By manipulating input parameters that feed into the validateSubquery function, a remote adversary can construct malicious payloads that evade detection by the flawed validation logic. Once executed, these injected queries run with the privileges of the database user associated with the WeKnora application. This capability fundamentally undermines the confidentiality and integrity guarantees provided by the database management system. The vulnerability is exploitable remotely, meaning an attacker does not need prior access to the internal network or local machine credentials to initiate an attack, significantly expanding the potential attack surface across internet-facing deployments of the software.
The operational impact of this SQL injection vulnerability is severe and multifaceted. Successful exploitation can lead to unauthorized data disclosure, where sensitive information stored in the database is extracted by the attacker. Furthermore, depending on the specific capabilities granted to the database user account, an attacker may modify or delete critical records, disrupting business operations and causing significant data loss. In more advanced scenarios involving certain database configurations, SQL injection can be leveraged for remote code execution, allowing full compromise of the underlying server infrastructure. The fact that this exploit has been disclosed publicly increases the risk profile substantially, as automated scanning tools and malicious actors actively monitor such disclosures to identify vulnerable targets in real-time.
From a classification perspective, this vulnerability aligns with Common Weakness Enumeration identifier CWE-89, which covers Improper Neutralization of Special Elements used in an SQL Command. This category encompasses various forms of injection flaws where user-supplied input is not properly validated or sanitized before being included in database queries. In terms of the MITRE ATT&CK framework, this vulnerability facilitates techniques associated with Initial Access and Collection phases, specifically those involving Database Query Injection. Attackers can utilize these capabilities to exfiltrate data from application databases without triggering standard intrusion detection systems that do not inspect deep packet payloads for SQL syntax anomalies.
To mitigate this risk, immediate action is required by administrators and developers managing Tencent WeKnora instances. The recommended course of action is to upgrade the software to version 0.8.2 or later, which incorporates a patch addressing the flaw in the validateSubquery function. The specific commit responsible for resolving this issue is identified as d7ccd5ba517cc3968e6d5000a2ab0f4b51ef1dda. Until the upgrade can be performed, organizations should implement strict input validation at the application layer and utilize parameterized queries or prepared statements wherever possible to minimize exposure. Additionally, deploying Web Application Firewalls with SQL injection detection rules may provide a temporary layer of defense against exploitation attempts while patching procedures are executed. Regular security audits and code reviews focusing on database interaction layers are also advised to prevent similar vulnerabilities in future development cycles.