AlpacaHack 2026May 2026

Uncategorised91

The upstream scoreboard did not say, so neither do we.

• Alpaillier

  3 official solutions

  Also written up in: goroshirow/CTF-WriteUps, th0rnp4rser-droid/CTF-Writeups, goroshirow/CTF-WriteUps

• Alpaca Llama Ranch

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• Compressor

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• Crazython

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• Optimal Sort

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• Paca Paca Authenticator

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• RRe Time Limiter

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• Shellcode 101

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• simple ROP

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• System V

  2 official solutions

  Also written up in: goroshirow/CTF-WriteUps, goroshirow/CTF-WriteUps

• :Nine:

  1 official solution

  Also written up in: 13lackade/ctf-writeups

• 01 Osint

  1 official solution

  Also written up in: minaminao/ctf-writeups

• 06 Jailiaj

  1 official solution

  Also written up in: minaminao/ctf-writeups

• 100

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• 11 Destructuring

  1 official solution

  Also written up in: minaminao/ctf-writeups

• 17 Base Length

  1 official solution

  Also written up in: minaminao/ctf-writeups

• A Piece of DHKE

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• A slight mistake

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• AAAAAAAAEEEEEEEESSSSSSSS

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Alpaca Rangers 2

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Animal Viewer

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Bashrunner

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Basic Buffer Overflow

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Bounds Checking

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• C++ flag checker

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Cache Me If You Can

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Conquer Ultimate Device Abyss

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Curl As A Service

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Curl As A Service 2

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Do The Math

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Dockerstack

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Equation Cipher

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Even Worse RSA

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Fake Shuffle Proof

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Flag Obfuscation

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Flag Printer 20XX

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Func Array

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Fushigi Crawler

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Guess.Js

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Hello Programmer!

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Hidden Service

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• High And Low

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Honk The Klaxon

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• HTML2PNG

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• I cannot decrypt RSA

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Image Python

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Inu Profile

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• isNan

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Jailiaj

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Jinjail

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Kakuzuke

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Lazy RSA

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Let's Poly1305!

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Linear Coffee Generator

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Look like Alpacahack

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Multi Xor

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Nc Magic

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• No JS

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• One Byte Padding Oracle Attack

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• One More Login Challenge

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Only forward

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Permission Denied 2

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Permisson Denied 3

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Please Link This

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Python Impossible

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Rate My Alpaca

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Ret2basics

  1 official solution

  Also written up in: 13lackade/ctf-writeups

• Reused N

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Rock Paper Scissors Lizard Spock

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• RPS GAME

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Ruby Flag Checker

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Secret Table

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Secret Table 2

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Small d

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Small e

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Small Image Uploader

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Square RSA

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Stateless Auth

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Substance

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Super Short Python Golf

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Super Simultaneous Equations

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• The Horn

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• The World

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• ToyPQC

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Unhead

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Unrevealed TXT

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Vending Machine

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Vm1

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• What Is My Size

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Wither

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps

• Xorshift521

  1 official solution

  Also written up in: goroshirow/CTF-WriteUps