Writeups from the capture-the-flag competitions I play, organised by event. You’ll find solutions across web, crypto, reversing, pwning, forensics, and misc — each one documenting the full path from challenge prompt to flag, including the commands, scripts, and payloads that actually worked.
Events covered so far:
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A collection of 27 challenge writeups from DalCTF 2026, a Jeopardy-style capture-the-flag competition held in June 2026. Each writeup walks through the full solve path — recon, the key insight, exploitation, and the flag — with the actual commands, scripts, and payloads used. Challenges are grouped by category: Web — 8 writeups Crypto — 6 writeups Reversing — 4 writeups Forensics — 3 writeups Misc — 3 writeups Pwning — 3 writeups Browse the full list below, or use the filter to jump to a specific challenge.
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: Web — 7 writeups Reversing — 3 writeups Misc — 3 writeups Crypto — 2 writeups Pwning — 1 writeup Browse the full list below, or use the filter to jump to a specific challenge.
Writeups from the Zer0d4yh31st CTF, covering the web exploitation challenges I solved during the event. Each post breaks down the vulnerability, the steps to exploit it, and the flag — with the commands and payloads used along the way. Web — 2 writeups Browse the full list below.