CVE-2026-44542: FileBrowser Public Share DELETE API Path Traversal Allows Unauthenticated Arbitrary File Deletion

Attacker-controlled path input is joined with a trusted base path prior to sanitization, allowing traversal sequences (e.g., ../) to escape the intended shared directory. As a result, an unauthenticated attacker possessing a valid public share hash with delete permissions enabled can delete arbitrary files outside the shared directory within the share owner’s configured storage scope.