Node.js — Node.js 26.4.0 (Current)

Node.js 26.4.0 has been released with several semver-minor additions. Key highlights include a new minimal `node:vfs` subsystem with VFS mounting support for `node:fs/promises`, caller-supplied buffers for `readFile()`, package maps in the module loader, TLS certificate compression option, TCP keepalive interval and count controls (`TCP_KEEPINTVL`/`TCP_KEEPCNT`) in `setKeepAlive`, and improved HTTP idle connection handling. The release also includes numerous bug fixes across streams, crypto, QUIC, SQLite, debugger, and the file system watcher, plus dependency updates (npm 11.17.0, libffi 3.6.0, SQLite 3.53.2, ngtcp2 1.23.0) and performance improvements in buffers and streams.