SiYuan 3.8.3 MCP File Operations Path Traversal

SiYuan versions 3.8.0 through 3.8.3 contain an incorrect authorization issue in recursive MCP file operations. An authenticated administrator can bypass the sensitive-path guard to read protected descendants or overwrite them through archive extraction...

CVE-2026-100633 SiYuan 3.8.0 through 3.8.3 Path Traversal via MCP File Operations

SiYuan is a self-hosted personal knowledge management system. In versions 3.8.0 through 3.8.3, the MCP file tool's sensitive-path guard util.IsForbiddenAbsPath, invoked from resolvePath is applied only to the allowed root of recursive operations and not to each resolved descendant path — an...