Legal
Terms of use
The rules for using Cyber CTF labs.
Last updated: October 2026
Cyber CTF provides free, open-source security labs for learning.
Use the labs, and only the labs
The techniques you practise here must only be used against the lab environments you run, or systems you are explicitly authorized to test. Attacking Cyber CTF, Cyber Auth or any third party is forbidden.
Your machine
Labs run on your own computer or infrastructure. They are intentionally vulnerable: keep them isolated from production networks and stop them when you are done.
Fair play
Your evidence is personal. Don’t automate submissions or try to obtain another player’s evidence.
No warranty
The labs and the launcher are provided as is, without warranty. Lab repositories are licensed individually.