A collection of 16 challenge writeups from GPN CTF 2026, the Gulaschprogrammiernacht capture-the-flag competition held in June 2026. Every writeup documents the complete solution — from first look at the target through the exploit and the flag — with the real commands, scripts, and payloads.
Challenges are grouped by category:
Browse the full list below, or use the filter to jump to a specific challenge.