Welcome to BrunnerCTF 2026™
Classification: Public
Open to everyone worldwide and used for the official BrunnerCTF CTFtime competition.
Competing for Danish prizes? You must play on the separate Danish platform. Placement in the Global division does not count towards the prizes.
DANISH PRIZE COMPETITION →After last year's tremendous success, our small home-bakery startup has entered a period of extreme exponential growth. With fresh capital from our stakeholders, an increasingly ambitious roadmap, and absolutely no pressure to deliver shareholder value, we are proud to welcome you to Brunnerne Inc.™
"Our strategy for 2026 is crowdsourcing: expose a carefully selected portfolio of questionable systems to the internet and tell a group of highly motivated strangers not to touch them." — CISO, Brunnerne Inc.
This is Global Operations: our open international competition and the official BrunnerCTF event on CTFtime. Expect challenges across Web, Crypto, Forensics, Rev, Pwn, OSINT, and whatever other initiatives survived the quarterly planning meeting.
Whether you are joining as a new intern or an experienced senior consultant, we hope you achieve exceptional returns on your invested weekend. And yes - despite the restructuring, there will still be cake.