f289aae1f5
uvx.exe (uv's actual Windows shim) and pipx.exe bypassed the MCP OSV malware check entirely, and backslash-qualified commands only resolved when running under ntpath. Basename now splits on both separators; matching stays exact (npx.cmd / uvx.exe / uvx.cmd / pipx.exe) so lookalikes like npx.exe or npx.cmd.bak remain fail-open.