Symbolic Link Path Traversal in pgAdmin File Manager

CVE-2026-7819 is a path traversal vulnerability in pgAdmin 4's File Manager that allows authenticated users to write files outside their intended storage directory. The vulnerability exists because the access permission check uses os.path.abspath(), which resolves relative path components like '..' but does not follow symbolic links, while the subsequent file write operation does follow symlinks. An attacker with pgAdmin access can create a symbolic link within their own storage area pointing to a sensitive location outside it—such as configuration files, application directories, or system paths—and trick pgAdmin into writing arbitrary content there. This affects any organization using pgAdmin 4 for database administration, particularly those with multiple users or untrusted administrative access.

Casky's Claude-powered security skills would detect the attack patterns underlying this vulnerability by analyzing file system operations and path resolution inconsistencies. While this specific CVE maps to CWE-61 and CWE-22 (path traversal weaknesses) rather than discrete MITRE ATT&CK techniques, Casky practitioners would identify indicators such as: unusual symbolic link creation patterns within user directories, divergence between permission validation paths and actual file write destinations, and authentication logs showing file operations that don't align with expected directory boundaries. The platform's 754 mapped skills would highlight access control bypass attempts (T1548), privilege escalation signals, and file system manipulation anomalies that practitioners should monitor in pgAdmin process behavior and audit logs.