CVE-2026-41948 is a path traversal vulnerability in langgenius's Dify product affecting versions 1.14.1 and prior. Authenticated users can exploit insufficient URL path sanitization in requests forwarded to the Plugin Daemon's internal REST API. By using unencoded dot sequences in task identifiers or manipulating filename parameters, attackers can traverse outside their authorized tenant directory to access internal endpoints, including debug interfaces. The vulnerability requires knowledge of the victim tenant's UUID. The Dify Cloud service permits unauthenticated free self-registration, which lowers the barrier for attackers to create accounts and exploit this vulnerability. No official patch or remediation guidance is currently documented.

Successful exploitation allows attackers to access internal REST API endpoints beyond their authorized tenant scope, potentially exposing sensitive debug interfaces or other internal functionality. This can lead to unauthorized information disclosure or further compromise of the system. The vulnerability is critical with a CVSS 4.0 score of 9.3, indicating high impact and ease of exploitation. The ability for unauthenticated users to freely register accounts on Dify Cloud increases the risk of exploitation.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the Plugin Daemon's internal REST API to trusted users only and monitor for suspicious activity involving path traversal patterns. Consider disabling or restricting debug interfaces if possible. Since unauthenticated free registration is allowed, implement additional controls such as rate limiting or tenant UUID protections to reduce attack surface.