Hacker leaks French nuclear secrets in massive cyber breach

A hacker has leaked 13 gigabytes of internal data stolen from France’s state-linked defense shipbuilder Naval Group, including sensitive nuclear-related information, French broadcaster France3 reported.

The hacker, known by the alias "Neferpitou", published the trove online. It reportedly includes source code for combat systems used on French frigates and nuclear submarines, weapon system software, simulation environments, network schematics, and user manuals.

Cybercrime expert Clément Domingo confirmed the authenticity of the leak, noting that the files were made publicly available.

Naval Group has not yet issued a formal statement regarding the incident.