CVE-2026-2111 is a path traversal vulnerability identified in JeecgBoot, an open-source low-code development platform widely used for enterprise applications. The vulnerability exists in the Retrieval-Augmented Generation Module, specifically in the /airag/knowledge/doc/edit endpoint, where the filePath parameter is insufficiently sanitized. This allows an unauthenticated remote attacker to manipulate the filePath argument to traverse directories and access arbitrary files on the server's filesystem. The vulnerability affects all versions up to 3.9.0. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), no user interaction (UI:N), and limited confidentiality impact (VC:L) with no impact on integrity or availability. The vendor was contacted but did not respond, and no official patch or mitigation guidance has been released. Public exploit code is available, increasing the risk of exploitation. This vulnerability could lead to unauthorized disclosure of sensitive files, potentially exposing credentials, configuration files, or intellectual property. The lack of authentication requirements and remote exploitability make this a notable risk for organizations deploying JeecgBoot in production environments.

For European organizations, the primary impact is unauthorized disclosure of sensitive information due to path traversal attacks. This could compromise confidentiality of internal documents, configuration files, or user data stored on affected servers. Organizations in sectors such as finance, healthcare, government, and manufacturing that use JeecgBoot for internal knowledge management or document handling are at heightened risk. Exploitation could facilitate further attacks, including lateral movement or privilege escalation if sensitive credentials or keys are exposed. The medium severity score reflects limited impact on integrity and availability but significant confidentiality concerns. The remote and unauthenticated nature of the exploit increases the attack surface, especially for internet-facing applications. The absence of vendor response and patches means organizations must rely on internal mitigations, increasing operational risk. European data protection regulations (e.g., GDPR) impose strict requirements on data confidentiality, so breaches could also lead to regulatory penalties and reputational damage.

1. Implement strict input validation and sanitization on the filePath parameter to prevent directory traversal sequences (e.g., ../). 2. Use allowlists for file paths or restrict file access to specific directories using secure coding practices. 3. Deploy Web Application Firewalls (WAFs) configured to detect and block path traversal attack patterns targeting the /airag/knowledge/doc/edit endpoint. 4. Monitor server and application logs for unusual file access patterns or repeated attempts to access parent directories. 5. Isolate the affected module in a restricted environment with minimal privileges to limit potential damage. 6. If possible, disable or restrict access to the vulnerable module until a patch is available. 7. Conduct internal code reviews and penetration tests focusing on file handling functionalities. 8. Maintain an inventory of JeecgBoot deployments and prioritize patching or mitigation efforts accordingly. 9. Engage with the JeecgBoot community or maintainers for updates or unofficial patches. 10. Educate developers and administrators about secure file handling and path traversal risks.