CVE-2026-57441: MCPVault is a lightweight Model Context Protocol server for safe access to files in an Obsidian vault. Prior to 0.11.4,

MCPVault (a tool that lets AI safely access files in Obsidian vaults, which are note-taking systems) has a security flaw in versions before 0.11.4 where it checks restricted directories in a way that doesn't account for how modern operating systems treat uppercase and lowercase letters the same. An attacker can trick an AI into accessing or modifying sensitive files by using different letter cases (like '.GIT' instead of '.git') or adding trailing spaces on Windows, bypassing the safety checks.