BrunnerCTF 2026

Welcome to BrunnerCTF 2026.

The entire team at Brunnerne have been cooking and baking new exciting challenges for you to try, as we've expanded from a small home-bakery startup into an international unicorn as Brunnerne Inc.™ , with this year's theme: "Brunnerne goes corporate" .

Whether you are a completely new CTF intern or a senior executive vice president of CTF competitions , there will be delicious challenges waiting for you. This includes our beginner-friendly category now rebranded as "Onboarding" . The category features plenty of opportunities to learn the basics, and the chance to ask us for hints on Discord if you get stuck.

And although Brunnerne Inc.™ is now a global phenomenon, we promise plenty of traces of traditional Danish pastry .

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❯ Start: 2026-08-21 14:00 CEST

❯ End: 2026-08-23 14:00 CEST

❯ Website: ctf.brunnerne.dk

❯ Discord: discord.gg/wPaa2kdM97

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Proudly sponsored by:

❯ Campfire Security

❯ ICSRange

❯ SagaLabs

❯ The LEGO Group

❯ Bankdata

❯ CyberSkills

❯ Hetzner - infrastructure

Official URL: https://ctf.brunnerne.dk/

CTFtime URL: https://ctftime.org/event/3065/

Official prize text: NOTE: Prizes are exclusively available to eligible Danish teams competing on the separate Danish BrunnerCTF platform and scoreboard under a strict no-AI policy.

━━━━━━━━━━━━━━━━ 1ST PLACE ━━━━━━━━━━━━━━━━

❯ SagaLabs 1st-place prize package

    ↳ SagaLabs hoodies

    ↳ One 3,000 DKK Proshop gift card

    ↳ One case of Monster Energy

❯ Campfire Security Unlimited Access 1-year subscriptions

❯ LEGO® sets

❯ LEGO® keyrings

❯ BrunnerCTF 2026 mugs

❯ BrunnerCTF 2026 T-shirts

━━━━━━━━━━━━━━ 2ND–5TH PLACE ━━━━━━━━━━━━━━

❯ Campfire Security Unlimited Access 1-year subscriptions

❯ LEGO® sets

❯ LEGO® keyrings

❯ BrunnerCTF 2026 mugs

❯ BrunnerCTF 2026 T-shirts

━━━━━━━━━━━━━ 6TH–10TH PLACE ━━━━━━━━━━━━━

❯ Campfire Security Unlimited Access 1-year subscriptions

❯ LEGO® keyrings

❯ BrunnerCTF 2026 mugs

❯ BrunnerCTF 2026 T-shirts

━━━━━━━━━━━━ 3 BEST WRITEUPS ━━━━━━━━━━━━

❯ BrunnerCTF 2026 water bottle