This side program features challenges with a different flavor from Daily AlpacaHack. We publish one harder or more unconventional challenge every few days.
Solve each challenge within its time window to appear on the leaderboard.
Discussion with friends or AI is welcome (account sharing is prohibited).
Sharing solutions is allowed only after the challenge period has ended.
New to CTFs?
This program features higher difficulty and unconventional challenges. Try the beginner-friendly Daily AlpacaHack first to warm up.
iwancof
kakur41
minaminao
k0080k0080
tchenTopic: iframeReleased: May 12, 2026
I built an HTML preview service using an iframe. I hope the "sandbox" attribute is enough to prevent XSS.
