CVE-2026-22687 is an SQL Injection vulnerability classified under CWE-89 affecting Tencent's WeKnora framework, a large language model-powered tool for deep document understanding and semantic retrieval. The vulnerability exists in versions prior to 0.2.5 when the Agent service is enabled, which allows users to invoke a database query tool. Due to insufficient backend validation of user inputs, attackers can craft malicious prompts that bypass query restrictions, enabling them to inject arbitrary SQL commands. This can result in unauthorized disclosure of sensitive data, modification or deletion of database contents, and potential disruption of service. The vulnerability is remotely exploitable without requiring authentication or user interaction, increasing its risk profile. The CVSS v3.1 score of 8.1 reflects high impact on confidentiality, integrity, and availability, with network attack vector and high attack complexity. Although no exploits have been reported in the wild yet, the flaw represents a critical risk for any deployment of WeKnora prior to the patched version 0.2.5. The patch addresses the backend validation shortcomings, preventing prompt-based bypasses and securing database queries.

For European organizations, exploitation of this vulnerability could lead to significant data breaches involving sensitive or proprietary information stored within WeKnora's backend databases. This could result in loss of intellectual property, exposure of confidential client or internal data, and potential regulatory non-compliance under GDPR due to unauthorized data access. The integrity of data could be compromised, leading to corrupted or manipulated datasets that affect business operations or decision-making processes. Availability impacts could arise if attackers execute destructive SQL commands, causing service disruptions or downtime. Organizations relying on WeKnora for document understanding and semantic retrieval could face operational setbacks and reputational damage. Given the remote and unauthenticated nature of the exploit, attackers could target exposed WeKnora instances across networks, increasing the attack surface. The lack of known exploits currently provides a window for proactive mitigation before widespread exploitation occurs.

European organizations should immediately upgrade all WeKnora deployments to version 0.2.5 or later to apply the official patch that fixes the SQL Injection vulnerability. In addition to patching, implement strict input validation and sanitization on all user-supplied data, especially those interacting with database query tools. Employ Web Application Firewalls (WAFs) with custom rules to detect and block SQL Injection patterns and anomalous query behaviors. Monitor database query logs and application logs for unusual or unauthorized access attempts indicative of injection attacks. Restrict network access to the Agent service and database query tools to trusted internal networks or VPNs to reduce exposure. Conduct regular security assessments and penetration testing focused on injection flaws in WeKnora integrations. Educate developers and administrators on secure coding practices and the risks of prompt-based injection techniques. Finally, maintain an incident response plan to quickly address any detected exploitation attempts.