CVE-2026-68578 [HIGH] – ArcadeDB versions before 26.7.3 fail to bind the authenticated principal in the MCP HTTP t

ArcadeDB versions before 26.7.3 fail to bind the authenticated principal in the MCP HTTP transport, causing all engine permission checks to silently pass as no-ops. Non-root MCP-allowed users can perform arbitrary database writes, DDL, schema mutations, and execute arbitrary JavaScript code via the query tool.