90,626 Jupyter Notebooks Found Publicly Indexed Online

ZoomEye's fingerprint matched 90,626 hosts running Jupyter Notebook as of September 21, 2026. Unauthenticated instances expose a kernel terminal, letting any visitor run code as the service user.

• ZoomEye matched 90,626 Jupyter Notebook hosts as of 2026-09-21
• The count includes authenticated instances, so it is an upper bound
• Unauthenticated notebooks expose a terminal and remote code execution
• Jupyter has enabled token authentication by default since version 5.0